House File 2571 amends Iowa's rules of criminal procedure regarding the assessment of a defendant's dangerousness in cases of insanity acquittal. The bill introduces a new subparagraph (4) to Iowa rule of criminal procedure 2.22(8)(e), stating that the absence of recent overt acts of dangerousness cannot be the sole factor in determining whether a defendant poses a risk to themselves or others. The court is required to consider a range of factors, including the nature of the original offense, the defendant's behavioral and psychiatric history, substance use disorder history, institutional behavior, environmental influences, and expert testimony.

Additionally, the bill emphasizes the importance of evaluating a defendant's potential danger in the context of their current mental health status and the structured environment in which they may be confined. The revised rules are to be submitted for legislative council review by October 14, 2026, ensuring that the assessment process is comprehensive and considers various aspects of a defendant's history and behavior.