That decision came Tuesday during a hearing for Lance Nanamkin.
Prosecutors say he got into a wild shootout with police where more than 70 shots were exchanged.
Nanamkin got hit six times, including twice in the head.
Investigators say he was armed with an assault rifle when he lead police on a chase from Toppenish in a stolen car.
Nanamkin was convicted in a gang shooting ten years ago.
"I've never seen a case where you've had someone suffer such a head injury. I know they've happened in the past. Every case is individual," said Yakima County Prosecutor Ken Ramm.
Doctors at Eastern State Hospital in Spokane will do the evaluation in about three weeks.