The opinion
SCHWAB, C. J.,
specially concurring.
Under the particular circumstances of this case I believe the trial court was too restrictive in the scope of cross-examination it indicated it would allow with regard to the witness Costello. Nevertheless, I am satisfied there was substantial evidence of defendant’s guilt independent of the witness Costello, and therefore agree that we should not consider the matter in the *23 absence of an offer of proof. The only question asked and answered was of no substance and nothing indicates that defendant’s counsel would have been more effective had he continued by way of an offer of proof.