OKLAHOMA CITY — A suburban Oklahoma City couple whom investigators say was killed by their 19-year-old son both died of what the state medical examiner's office says were "multiple gunshot wounds."

Autopsies released Thursday say 50-year-old Michael Logan Walker suffered seven gunshot wounds while his wife, 44-year-old Rachel Walker, suffered 10 gunshot wounds.

The two died in their Edmond home in March. Their son, Michael Elijah Walker, was arrested on murder charges after his brother told police his sibling said he "shot their parents because they were sending him messages telepathically and they were Satan worshippers."

Defense attorney Derek Chance has called the suspect "very mentally ill." A judge has ruled him incompetent for trial and ordered him to undergo mental health treatment with a competency review scheduled for Nov. 22