certain questions asked by Miller about which Miller had reported reasonably normal results. Beasley was asked by Miller to perform simple arithmetical calculations, to explain proverbs, and to count backwards. Afton testified that he relied on Miller’s analysis of Beasley’s responses in forming his opinion that Beasley was sane.
Dr. Whittington, another psychiatric witness, testified that his conclusion that Beasley was insane was based in part on his inability to perform simple arithmetical calculations, his understanding of proverbs, and his understanding of the similarities between pairs of objects. These were precisely those portions of the examination not conducted personally by Afton. Since Af-ton’s opinion was essentially the same as the testimony of Miller and that of another psychiatrist who testified for the People, his testimony buttressed the testimony of the other prosecution psychiatrists without his having conducted or independently analyzed key portions of the examination.
Beasley also alleges error in the cross-examination of Whittirigton. Over the objection of defense counsel, the trial court permitted the district attorney to question Whittington regarding a theory elaborated in a text upon which he did not rely in arriving at his opinion. He argues that such examination is not permissible unless the expert relied upon the treatise. We disagree.
While Beasley argues that traditional position, the modern rule is that an expert may be cross-examined using learned treatises even though he did not rely upon them in reaching his conclusions. Fed.R.Evid. 803(18). See also Colorado Rules of Evidence (CRE) 803(18) (effective January 1, 1980). Beasley also contends that no foundation was laid for asking the witness if he agreed with the treatise. While this may be so, Beasley was not prejudiced by this omission since Whittington readily acknowledged existence of the theory in question and stated his disagreement with that theory on redirect examination.
Since Beasley is correct that the trial court should have informed the jurors of the effect of the verdict of not guilty by reason of insanity, on retrial, the trial court, upon request, should instruct the jury on commitment procedures in accordance with People v. Thomson, Colo., 591 P.2d 1031 (1979).
II.
The Trial on the Not Guilty Plea
Beasley challenges his conviction in the trial of the substantive charges alleging that the trial court erred in failing to instruct the jury on the limited purpose of evidence of his other criminal activities and in denying his motion to suppress the in-court identification by the female victim. Again, we reverse.
The court admitted evidence showing that sometime prior to the kidnapping and shooting, Beasley, while in possession of a weapon, had threatened to kill Jordan. The trial court refused the limiting instruction tendered by defense counsel regarding this evidence, see Stull v. People, 140 Colo. 278, 344 P.2d 455 (1959), and Beasley contends that this was reversible error.
Evidence of other crimes is inadmissible unless it is offered for the purpose of proving scheme, plan, intent, or design. People v. Ihme, 187 Colo. 48, 528 P.2d 380 (1974); see Colorado Rules of Evidence (CRE) 404(b) (effective January 1, 1980). However, where evidence of other crimes is admitted under one of the exceptions, the trial court is required to give cautionary instructions limiting the purpose of the evidence. People v. Goldsberry, 181 Colo. 406, 509 P.2d 801 (1973); 1 Wharton’s Criminal Evidence § 264 (13th ed. 1972); see People v. Pacheco, 191 Colo. 499, 553 P.2d 817 (1976). Consequently, while the evidence of threats and weapon possession were admissible to show intent, the trial court should have given a limiting instruction. See People v. Pacheco, supra.
Beasley finally argues that the trial court erred in allowing the female victim to testify to her prior out-of-court photo identification of him and to identify Beasley in court without establishing an adequate independent basis for that identi