The opinion
De Graff, J.
(dissenting).
I cannot concur with the views expressed by the majority on any one of the three grounds upon which an affirmance is based, to wit: (1) That the unconstitutionally of the statute under which the instant indictment is drawn cannot be raised for the first time on appeal; (2) that the testimony of the prosecutrix is corroborated, as required by Section 5488 of the Code; and (3) that there is competent or sufficient evidence proving or tending to prove that the defendant is over 25 years of age, which is a material allegation of the indictment.
I. It is urged by the State, and sustained by the. majority opinion, that the uneonstitutionality of the statute in question cannot be raised for the first time in this court. We have heretofore/ and in but one case, squarely and definitely ruled this proposition, and the present ruling law is found in State v. Gibson, 189 Iowa 1212 . It is there said:
“If the fact that the indictment charges no crime can be first urged on appeal, it surely follows that, if the statute under which prosecution is had is, in law, no statute, then the defendant is prosecuted for something that does not constitute a crime, as much so as when he is convicted under an indictment which fails to charge a crime.”
No act is a crime in Iowa unless made so by statute. Although we borrow definitions- of crime from the common law, there are no common-law crimes in this state. If a criminal statute is violative of the Constitution, it was never legally enacted, and the prosecution of a person thereunder is the prosecution for an act that does not constitute a crime. The foundation of a criminal cause rests upon the validity of the statute on which the prosecution is based. Commonwealth v. Sana, 195 Mass. 262 . It is the inherent right of a court to see that constitutional provisions are observed in criminal procedure, and this right ought to be exercised for the protection of the citizen at all times. In Schwartz v. People, 46 Colo. 239 , the constitutionality of the law upon which the indictment was based was *800 not directly challenged or passed upon in the trial court, but was urged for the first time on appeal. It is said in opinion:
“Since that question is now urged, and since it is fundamental, the duty of the court to meet and dispose of it seems plain; for it must be that, if the law is void, a conviction or sentence under it may not be upheld or enforced, and the defendant should go free. If the law upon which the prosecution is based is unconstitutional, then it is no law, and there can be no offense for the supposed violation of its terms. * * * The very foundation of the cause rests upon the validity of the statute, and in which alone is found the power and authority of the court to act at all.”
Surely no judgment can stand in greater need of correction than one rendered in a criminal cause for an act defined as criminal in violation of constitutional principles. It is generally held that an appellate court may take notice on its own motion at any time of the want of jurisdiction ratione materia, and set aside an appealed judgment, or that an act charged as a crime is unknown to the law may be raised for the first time on appeal. See State v. Daniels, 90 Iowa 491 ; State v. Potter, 28 Iowa 554 ; State v. Tieman, 32 Wash. 294 .
The validity or justice of the rule stated in the Gibson case, supra, is not contrary to any rule heretofore affirmed by this court.
In State v. Wilson, 124 Iowa 264 , the unconstitutionality of a statute was intimated by appellant, and it is held that he who alleges the unconstitutionality of a statute must point out the particular provision of the Constitution that is violated. The statute was previously declared constitutional. The apparent conflict in State v. Perkins, 143 Iowa 55 , is found in these words:
“If the constitutionality of a statute is a question properly presented to the court for determination, the court’s duty is plain. But, until the question is so raised, we think the statute should be obeyed.”
In the Perkins case, the question involved is that the district court had no jurisdiction to fix an absolute term of imprisonment under the Indeterminate Sentence Act. In Olander v. Hollowell, 193 Iowa 979 , the unconstitutionality of the statute *801 involved was predicated on alleged irregularities in the adoption of an amendment to the Constitution of Iowa, under which the County Attorneys’ Information Law was enacted by our state legislature. No other point was properly before the court for determination, and the decision is not relevant to the proposition involved in the ease at bar.
Whether or not the constitutionality of a statute can be raised for the first time in this court depends, under my point of view, whether the statute upon which the indictment is drawn is subject to attack, and not a statute that is brought into the case incidentally or collaterally. This is illustrated in our own case of State v. Burch, 195 Iowa 427, 433 , in which the constitutionality of Section 5299 of the Code of 1897 was raised for the first time in this court. It involves the distinction, if any, between, principal and accessories, which was a collateral matter. It did not involve the crime charged or the statute upon which the indictment is based.
There is a lack of harmony in the decisions, but many of the eases from other jurisdictions cited in support of the State’s contention fall short of determining the point under discussion.
In State ex rel. Vandiver v. Burke, 175 Ala. 561 , the appeal was from a judgment in quo warranto. The administration of criminal law is not involved. It is said:
‘ ‘ This court will never, on appeal,. investigate or inquire into the constitutionality qf statutes in civil cases where the questions were not raised or passed upon below, unless the statute is necessary to the jurisdiction of this court or to that of the court below.”
In Rushton v. State, 58 Fla. 94 , the record did not involve the constitutionality of a criminal statute, but the constitutionality of an act creating the trial court, concerning which' act the court said: “We are not now concerned and express,no opinion.” This is also true in Moore v. State, 126 Ga. 414 . In People v. Luby, 99 Mich. 89 , the defendant was indicted for keeping a saloon open on Sunday, and contended on appeal that the act of the legislature under which he was indicted was invalid because, when passed, it was read by its title only. It was held that such objection will not be considered when raised for the first time in the Supreme Court. In City of Topeka v. Kersch, *802 70 Kans. 840 , the defendant was arrested for illegal sale of liquor on an oral complaint, as provided by statute. The regularity of defendant’s arrest was not challenged in the police or the district court. He waived the technical averments of a written complaint. The court held that a conviction without written complaint would not impair appellant’s constitutional rights, as an arrest upon view of a crime committed in the presence of a police officer without warrant is not a violation of Section 15 of the Bill of Rights of the Constitution of Kansas, which guarantees against unreasonable searches and seizures.
In Fritz v. State, 178 Ind. 463 , the defendant offered evidence on the question of his insanity, and the court instructed in relation thereto. The authority to raise the issue and try it in the cause was based on a legislative enactment. On appeal, the State urged'for the first time the unconstitutionality of the act. It is said:
“These questions we decline to determine for the reason that in the trial of the cause the court and the parties assumed the section in question to be a valid enactment and to permit appellant to present the issue of his sanity under his general plea of not guilty.”
The Supreme Court felt bound to act on the theory of the trial court as contained in the evidence and the instructions, and so said.
In Roberts v. State (Tenn.), 247 S. W. 101 , the constitutional question attempted to be raised for the first time in the Supreme Court involved an act providing a method for the selection of a grand jury. The statute upon which the indictment was drawn was not in question. The matter suggested to the Supreme Court for the first time was collateral and incidental. The cause was reversed.
State v. Hertzog, 92 S. C. 14 ( 75 S. E. 374 ), involves the constitutionality of a statute which, when enacted, did not, as alleged, express properly the title of the act; and this point, not having been raised in the court below, cannot be reviewed on appeal. This is the only point in the decision relative to the proposition in issue, and this does not challenge the principle for which I am contending: that, if the statute which defines the crime and upon which the indictment is based is unconstitutional, *803 it is the province of any court having proper jurisdiction to so hold in the first instance.
In State v. Caldwell (Mo. App.), 245 S. W. 262 ; the defendant filed a motion for new trial and motion in arrest of judgment, and in both motions challenged for the first time the constitutionality of the act under which the information was filed. The court held that the defendant did not properly raise and save the question in the trial court. This is one case that squarely holds that “a constitutional question must be raised at the earliest opportunity possible in the trial court, and if not so raised, the question is waived. This rule has been held to apply to criminal as well as civil cases” (citing State v. Gamma, 215 Mo. 100 ). The court further says that it has never been able to see why a person convicted of a crime may not raise for the first time the question of the uneonstitutionality of a statute under which he is convicted, in a motion in arrest of judgment. I agree. If this is not presenting a question to the trial court, what does it do? The Missouri appellate was bound to follow the Supreme Court of that state, but did so with great reluctance.
In State v. Bildstein, 44 La. 778 ( 11 So. 37 ), the defendant for the first time on his appeal challenged the indictment; but the challenge did not go to the substance of the charge against the accused, but simply against its form. The court held that, had the accused desired to avail himself of any possible advantage that might accrue on that account, he should have filed a motion to quash the indictment, and, having failed so to do, the defect, if any, was cured. The case is not decisive of the point under consideration.
In Ellis v. State, 74 Fla. 215 ( 76 So. 698 ), it is held that, when the constitutional validity of a statute on which a prosecution is based is not raised in the trial court, but is merely suggested in the briefs filed in the appellate court, and the law is not patently in conflict with organic law, its validity will not be considered. There was a motion to quash the indictment, one of the grounds of which was that the language of the indictment charged no offense against the laws of' Florida. The error assigned on overruling the motion to quash suggests that the *804 statute is unconstitutional. This was held not to be sufficient, “as the statute is not patently in conflict with organic law.”
In State v. Kelley, 17 Wyo. 385 ( 98 Pac. 886 ), it is held that the constitutionality of a statute will not be passed on unless the decision is necessary to the determination of the pending controversy, or, as expressed, “unless the necessity therefor in the case pending clearly appears.”
In State v. Mack, 92 Vt. 103 ( 102 Atl. 58 ), the defendant was prosecuted under- the fish and game law relating to private preserves. The defendant suggested on appeal a constitutional question, but it was not raised on the trial, and the Supreme Court of Vermont refused to consider it. In opinion it is said:
“After verdict and before judgment, the respondent moved in arrest. The motion was overruled, and the respondent excepted. The grounds of the motion were either ,too general to be considered, or related to claimed defects which, if real, were cured by verdict, or else they related to exceptions in the prohibitive statute that did not constitute a material part of the definition of the offense denounced.”
In Mayor of Jersey City v. Thorpe, 90 N. J. L. 520 ( 101 Atl. 414 ), the defendant was convicted for the violation of an ordinance concerning the littering of the streets with refuse matter. For the purpose of the review, the court held that certiorari, and not writ of error, was the proper remedy, it being a review from a legislative agency, under the practice statute of New Jersey. It is also said that appellant has no right to argue in an appellate court constitutional questions based upon a stipulation entered into for the purpose of such appeal, and raising for the first time a question that was not raised in the court below (citing State v. Shupe, 88 N. J. Law 610 [ 97 Atl. 271 ]). In the Shupe case it is held that:
“The doctrine that a party need not be heard as to a question which could have been, but was not, raised in an intermediate court of appeals, is subject to these limitations, namely: First, where the question goes to the jurisdiction of the subject-matter * * * , and second, where a question of public policy is involved. ’ ’
A few courts of last resort have held that the unconstitutionality of a statute in a criminal case cannot be urged for the *805 first time on appeal. State v. Smith, 35 R. I. 282 ( 86 Atl. 890 ); Hendry v. State, 147 Ga. 260 ( 93 S. E. 413 ); People v. Esposito, 296 Ill. 535 ( 129 N. E. 846 ); State v. Gamma, 215 Mo. 100 .
In the case at bar, the statute itself, upon which the indictment is predicated, is under question, and I do not feel that the reasons urged are sufficiently weighty to cause this court to recede from the position taken in State v. Gibson, supra.
II. Does the evidence in this case establish the essential, ingredients of the crime charged, beyond a reasonable doubt? The verdict can be supported only upon inference and presumption.
At the close of plaintiff’s testimony, and upon the conclusion of all the testimony, a motion for directed verdict on behalf of the defendant was made, on the following primary grounds: (1) That the testimony of the prosecutrix stands unsupported by any competent corroborative testimony, as. required by Code Section 5488; (2) that there is no competent evidence to prove that the defendant is over 25 years of age, and without such affirmative evidence, the State has failed to establish one of the necessary and indispensable elements of proof. These motions were overruled by the court. The jury returned its verdict finding the defendant guilty of assault with intent to commit rape, and thereupon, defendant filed his motion for new trial, predicated on the grounds, amplified to a certain extent, that were urged in the motions for a directed verdict. This motion was overruled, and judgment was entered.
A defendant in a prosecution for rape or for assault with intent to commit rape cannot be convicted upon the testimony of the prosecutrix unless she is corroborated by other evidence tending to connect the defendant with the commission of the offense. This is statutory. Code Section 5488.
The record is devoid of corroborative testimony, within the purview of the statute, and a defendant under such circumstances is entitled to a directed verdict on an indictment charging rape. Not a line of the record as recited in the majority opinion corroborates the prosecutrix, tending to connect the defendant with the commission of the offense charged. She made no complaint to anybody. Nothing that she said constitutes res gestee. Her father and brother took her to the sheriff’s *806 office, but not by reason of anything that she had told them. She had been away from home and her place of work for several days, and this was a sufficient reason, we may assume, for inquiring into her whereabouts. While she was before the sheriff, some 12 or 14 hours after the alleged intercourse, she told him that the defendant had sexual relations with her. That she did or did not have intercourse with either of the Bassett brothers is wholly immaterial to any issue in this case, and the trial court properly sustained objections when the State attempted to prove intercourse with one of the Bassetts. The majority opinion attempts to predicate corroboration of her testimony upon the testimony of the sheriff, to whom she stated the material fact in issue. Clearly, her statements and déclarations as testified to by others could have no greater weight than the testimony of the prosecutrix under oath to the same effect. It is not corroboration, and we so held in State v. Egbert, 125 Iowa 443 .
Nor does the fact that the defendant was present at the very time and place corroborate the prosecutrix in any sense. This court has repeatedly held that mere opportunity is not corroboration. The defendant West did not create the situation. The undisputed record shows that he was there upon the invitation of the Bassetts. Why the prosecutrix was there is not shown, but it is sufficient for the issue involved to say that the defendant did not bring her there. Some emphasis is placed upon the fact that one of the Bassetts testified that West wanted him to “make a date” with the girl. One of many inferences could be drawn from this statement, and his request may have been wholly innocent. This court is not justified in imputing a criminal motive to the defendant, and no accused person should be convicted upon mere inference or presumption. These parties were strangers to the prosecutrix when she voluntarily came upon the show grounds and voluntarily stayed around and in the Bassett tent, sleeping there at night. Undoubtedly the defendant became acquainted with her on August 31st. The prose-cutrix was not in the tent by the solicitation of the defendant, or even the Bassetts, under the record before us, nor is it fair to the defendant to say he created the opportunity by sleeping in the Bassett tent. He was there upon the invitation of the Bassetts, and this invitation had no reference whatsoever to the *807 presence of the prosecutrix, and was extended before her voluntary appearance in the tent.
From this fact the majority opinion states that defendant created the opportunity by sleeping in the Bassett tent, and infers that his purpose in accepting the invitation was to have sexual intercourse with her. A man’s liberty is not worth much if he may be incarcerated in the penitentiary for the period of his natural life by accepting an invitation to sleep upon the premises of the inviting party when, forsooth, it is discovered subsequently that a young woman is also impliedly the recipient of a similar invitation. A further inference is drawn from these facts by the majority that the defendant and the Bassetts were in collusion, and as a final inference, — a presumption based uq>on a presumption, — that the girl was there for- an immoral purpose, and that this final inference constitutes corroboration. In other words, the State, by indirect impeachment of.its own and most material witness, predicates the corroboration of its witness, and asserts that this is the corroboration within the meaning of the statute.
The prosecutrix may have had sexual intercourse a dozen times with the Bassetts while she was in the Bassett tent without tending to corroborate her story that the defendant had intercourse with her.
The prosecutrix, who was over 16, but under 17, years of age, testified that the defendant had sexual intercourse with her in the Bassett tent about 1 o ’clock A. M. on Friday, September 2, 1921. She remained in the tent after the alleged intercourse, sleeping the balance of the night, and rising at 8 o’clock A. M. She remained at the tent until 1 P. M. on Friday, and then went to the home of Mr. Fitzpatrick, where she was employed. Her father and brother, who were apparently looking for her, found her there sometime Friday afternoon, but she did not acquaint them with the alleged incident at the tent. Her father then took her to Tipton, to the office of Sheriff Barclay. She does not remember that she immediately told the sheriff that West had abused her, nor does she remember just when she told’ the sheriff; but sometime during the afternoon, in a conversation with.the sheriff, she did tell him that West had had sexual intercourse with her. About 5 o’clock on that afternoon, she was taken to *808 the office of Dr. Jenks, who made an examination of her sexual organs. He testified that he found some laceration of the hymen, and that there was a putrefactive odor, and in his opinion the cause of the condition was of recent origin.
“Q. What would be the least possible time that the conditions-you refer to could have developed, in your estimation? A. Oh, two days — 48 hours.”
Upon redirect examination in reference to the same matter, the doctor testified:
“It would have to be 48 hours old anyway, and if the act of sexual intercourse occurred at 1 or 2 o’clock Friday A. M., you would hardly get it in that time — you would hardly get any putrefaction in that time.”
The testimony of the medical witness as to the physical condition of her private parts simply indicates that, in all probability, a crime had been committed, but it in no wise affords corroborating evidence tending to connect the defendant with the commission of the offense, but, on the contrary, disproves the fact. As bearing upon the proposition, see State v. Egbert, 125 Iowa 443 ; State v. Sells, 145 Iowa 675 .
In the instant case, the evidence is insufficient as corroboration of the prosecutrix, and as matter of law, a verdict of guilty of the offense charged or of the included offense should not, in my judgment, be sustained, upon this record.
III. No evidence was produced on the part of the State bearing upon the age of the defendant except the opinion testimony of three medical witnesses, who based their opinions upo.n their observation of the defendant in court. The testimony of Dr. Hoffman is typical of the testimony introduced, and we quote the record:
“Q. Do you observe the appearance of Harry West, the defendant, who sits here at the table? (Defendant objects as immaterial. Overruled, and exception.) A. I do. Q. And basing your opinion on your observation of Mr. West, his appearance, and whatever other facts you may care to take into consideration concerning his appearance, you may state to the jury what, in your opinion, the age of Mr. West now is. (Defendant objects on the ground that opinion testimony as to age is absolutely incompetent, immaterial, and irrelevant, and also *809 that the defendant is present in court, and is himself the best evidence. Also, that the witness has not been qualified as an expert, and has failed to state any facts or examination made by him, upon which to base any opinion. Overruled, and exception.) A. I have not made any examination of the gentleman; but from my opinion, looking at him, I should judge him to be between 30 and 35 years of age. (Motion to strike answer for same reasons was overruled, and exception).”
The doctor then proceeded to state facts based on his observation of the witness, and uppn which he predicated his opinion. These matters included the defendant’s complexion, his skin, his hair, his wrinkles on the forehead and on either side of the eye, his eyes, and his general appearance. Upon cross-examination, the doctor stated that a person incarcerated in jail for 90 days would become paler; that the best means of gauging the age of a human being is by the appearance of the individual, condition of his heart, his arteries, and internal organs; that he had not. carefully observed many men between the ages of 25 and 35; that, when he called upon a patient, he asked the age; and that there is no definite standard of judging a man’s age.
Dr. Jenks, a medical witness for the State, testified, on cross-examination:
“You find some men who from their facial expression appear to be much over 25 years of age, but in reality are under that age. ’ ’
Dr. Van Meter testified, on cross-examination:
“It is absolutely true that a person may appear to be a great many years older than he really is, in many cases, — it depends entirely upon how fast a man has lived, and what the nature of his dissipations were. Before I could fix a man’s age within a reasonable limit, I would want to know something about his previous life.”
This opinion evidence of the medical experts is challenged by appellant. His objections are twofold: (1) Its competency, and therefore its admissibility over objection, in the first instance. (2) Its sufficiency to prove an essential element of the crime charged, beyond a reasonable doubt. Both are sustainable.
The allegation of the indictment is that:
*810 “The said Harry West being tben and there a person of the age of 25 years or more.”
This is a material allegation, and it was incumbent upon the State to prove this essential beyond a reasonable doubt.
We must discriminate between age as a matter of fact and age as a matter of appearance. The statute and indictment deal with age as a matter of fact. It is of the very essence of the crime as charged. Is the evidence of a medical expert, based upon his superficial observation of a person, competent, and therefore admissible, as opinion evidence? Is it sufficient to establish guilt beyond a reasonable doubt?
The opinions of physicians and surgeons of practice and experience are admissible in evidence upon questions that are strictly and legitimately embraced in their profession and practice, but the opinions of medical men are not admissible on conclusions or inferences which it is the province of the jury to draw for themselves, or on matters of mere speculation. If the jurors are in possession or can be put in possession of all the facilities for forming a correct opinion that the witness had, they must come to their conclusion unembarrassed by the opinion of others. Unless the inquiry can be regarded as involving some matter of science or technical skill, the opinions of experts are of no higher probative force than the opinions of laymen on the same subject. In the instant case, the medical experts were not in possession of any particular or peculiar knowledge of the human system of the defendant, in making answer to the question propounded, and it is admitted by the expert that the medical profession has no standard whereby such opinions could be tested or based.
It is true that the line between questions of science or professional skill to which an expert may legally testify, and questions of mere judgment, which the jury alone are to answer, upon the facts proved, is not always susceptible of being clearly defined; but I have no hesitation in saying that the testimony as disclosed by the record in the case at bar is too uncertain, indefinite, and speculative to form the basis of judicial action, or sufficient to subject and deprive a citizen of his liberty for the rest of his natural life.
I am not disposed to extend the doctrine of expert testimony into the field of hypothetical conjecture and probability, and to *811 give certainty, as evidence, to that which, in its very nature, must be wholly uncertain and unsatisfactory, especially so when the rule of law requires the proof of the question in issue to be established beyond a reasonable doubt.
In State v. Smith, 61 N.C. 302 , the defendant was indicted and convicted for carnally knowing and abusing a female child under the age of consent, to wit, 10 years of age. There was evidence offered tending to show that the child was under 10 years of age. No objection was made to the evidence until after the jury returned its verdict, when the defendant entered his exceptions. Although it is recognized in the decision that the exception came too late, the court held that, as the exact age of the child was not known, it was competent for medical experts to give their opinion that she was under 10 years of age.
We have no quarrel with'the rule announced. We are not dealing with a ease involving a child of tender years or an old man in dotage. It is a case in which age is of the essence of the' crime as charged. It is generally recognized that there is a zone of* age prior and subsequent to the maturity of human beings when the court, in the exercise of judicial discretion, may legally receive evidence of this character. In Elsner v. Supreme Lodge K. & L. of Honor, 98 Mo. 640 ( 11 S. W. 991 ), it is said:
“No rule has yet been framed that can safely be applied as a touchstone for the difficulties that arise upon this subject. The differences of opinion between courts of last resort attest this. * * * Its relevancy in each particular case will depend on the nature of the issue to which it is directed.”
It is well settled that expert evidence is proper when the age of a child is at issue, and it has often been received concerning the age of an absent adult. Hartshorn v. Metropolitan Life Ins. Co., 55 App. Div. (N. Y.) 471. Whether a child was or was not at its birth a fully developed child is a matter that is subject to expert opinion testimony. Daegling v. State, 56 Wis. 586 . The reason is quite apparent. Even a lay witness (a mother of four children) was held competent to express her opinion whether a baby seen by her on a certain occasion was a newborn baby. Stewart v. Anderson, 111 Iowa 329 .
When a person lacks several years of his majority, a witness may testify that he believed from his appearance that he was a *812 minor. State v. Bernstein, 99 Iowa 5; Commonwealth v. O’Brien, 134 Mass. 198 . But see State v. Koettgen, 89 N. J. L. 678.
It is quite universally recognized judicially, with fairly well defined exceptions, that a nonexpert cannot give his opinion upon the question of age. In Ham v. State, 156 Ala. 645 , it is said:
“Will Bryant had testified as a witness before the jury. They saw him, and were as capable of drawing inferences as to his age (based on his appearance) as was-the witness Page. The court erred in allowing the witness to testify that Bryant ‘looked to be 40 or 45 years old.’ ”
In State v. Robinson, 32 Ore. 43 , the trial court refused to permit a lay witness for the defense to express his opinion as to the age of the prosecutrix, and the opinion reads:
‘ ‘ This was not a ease for the' admission of opinion evidence as to the age of a person. The. prosecutrix was present at the trial, and testified at great length, and the jury were just as competent to form an opinion as to her age from her size, appearance, and development as the witness.”
See, also, State v. Salgado, 38 Nev. 64 . If the prosecutrix had been absent during the trial, a different rule would prevail. State v. Grubb, 55 Kans. 678 .
“Possibly witnesses could speak with some confidence of the' probable age of an infant in the arms of its nurse; but development after that stage is so unequal that it would be dangerous to receive opinion evidence, at least of a nonexpert, upon a question of such vital importance to the accused." M artin v. State, 90 Ala. 602 .
In the case, the question was whether the defendant, who was indicted for murder, was under or over the age of 14 years at the time of the offense charged, and it was held that a witness who had known him seven or eight years was incompetent to testify that “in his opinion or judgment” he was between 15 and 16 years old. The inference or indirect reference to expert testimony is pure dictum.
In a criminal case in which a felony is charged, the jurors necessarily see the prisoner during the entire progress of the trial. They may and will draw their inferences as to age, based on the appearance of the prisoner, if age is a fact to be con *813 sidered. This presupposes that some competent evidence has been introduced on tbe question by the party having the burden of proof; otherwise their inferences would not be called into being.
The opinion of medical experts is admissible when such experts qualify on the particular subject in issue and it is shown 'that their profession or science recognizes some standard or principle under which the opinion may be properly classified as expert. In what respect, we ask, is a medical man, under the circumstances of the case at bar, more competent than a non-expert to express his opinion as to the age of a person when that opinion is based upon mere observation of him in the court room Í
The testimony in the instant case, to which proper and timely objections were made, constitutes but mere guess and conjecture on the part of the medical experts. The opinion expressed was not based upon any accepted' medical standard, but it is affirmatively shown that the opinion was based on the superficial observation of the defendant, as to his facial appearance only. The objections to the competency of the witness and of the evidence should, in my opinion, have been sustained.
For the reasons indicated herein, I would reverse.
Faville and VermilioN, JJ., join in the dissent as to the division on corroboration.