An attorney says a Montana man charged with assaulting a 13-year-old boy who refused to remove his hat during the national anthem believed he was doing what President Donald Trump wanted him to do.

Attorney Lance Jasper tells the Missoulian he will seek a mental health evaluation for Curt Brockway, a U.S. Army veteran who suffered a traumatic brain injury and was convinced he was following his commander in chief’s orders.

Jasper’s comments Wednesday came as prosecutors formally charged Brockway with assault on a minor.