(PITTSBURGH) — John Shick had mental health issues of his own before he went on a shooting spree last week at a psychiatric clinic in Pittsburgh that left one person dead and six wounded, according to investigators.
Local authorities are still trying to figure out Shick’s motivation and how he managed to walk into the most secure section of Western Psychiatric Institute and Clinic at the University of Pittsburgh with firearms.
The gunman was slain by security guards in a shooting exchange that ended the 15-minute rampage.
As for his past, investigators learned that Shick became violent with police at Portland International Airport in Oregon two years ago, resulting in him being committed to a psychiatric facility for six months after kicking an officer in the head.
Officials at Western Psychiatric Institute and Clinic are not saying whether Shick, most recently a biology student at Duquesne University, was a patient there, although there are indications he had been treated at the clinic.
Duquesne University officials also revealed Shick was banned from the campus after a female student filed harassment charges against him.
Copyright 2012 ABC News Radio
Susan Scutti, CNN
Pat Reavy, CNN
Chris Isidore, CNN
Euan McKirdy and Brianna Keilar, CNN