WICHITA, Kan. (AP) – Newly released medical records show a former Marine who ambushed and killed three Baton Rouge law enforcement officers last month never saw combat in Iraq, but told doctors he suffered from post-traumatic stress disorder because a buddy showed him videos of maimed and decapitated bodies.

Documents provided by the Veterans Health Administration to The Associated Press under the Freedom of Information Act show Gavin Long’s doctors diagnosed him in November 2011 as suffering from an “adjustment disorder with depressed mood,” but not PTSD.

Long, a black military veteran from Kansas City, Missouri, shot and killed three law enforcement officers and wounded three others on July 17 outside a Baton Rouge convenience store.

Long had posted rambling internet videos calling for violence in response to police treatment of African-Americans.