State v. Arellano

OPINION

MeGREGOR, Chief Justice.

¶ 1 The State brought this special action to resolve questions relating to the procedure and evidence involved in hearings held on mental retardation in capital cases pursuant to Arizona Revised Statutes (A.R.S.) section 13-703.02 (Supp.2005). We consider (1) whether a trial judge may determine that a defendant has established a rebuttable presumption of mental retardation by considering only expert reports of intelligence quotient (IQ) scores and (2) whether testimony from lay witnesses regarding a defendant’s present adaptive behavior is relevant to a…