The man was found guilty of aggravated murder and manslaughter in the slayings of his mother and brother.
A jury bought a defense that an Emory County man, allegedly experiencing methamphetamine-induced psychosis, thought his mother was a demon when he shot and killed her, his attorney said. But not when he did the same to his brother seconds later.
After three hours of deliberation Thursday, the jury handed down guilty verdicts of aggravated murder and manslaughter to Seth Gordon Peterson, concluding a three-day trial in 7th District Court.