C.R.S. § 16-8.5-110

In any hearing at which the competency of the defendant is an issue, witnesses not specially trained in psychiatry or psychology and not testifying as expert witnesses may testify as to their observation of the defendant’s actions and conduct and as to conversations that they have had with the defendant bearing upon the defendant’s mental condition. Any such witnesses, as part of their testimony, shall be permitted to give their opinions or conclusions concerning the competency of the defendant.