BATON ROUGE, La. (CNN) – Gavin Long, the man who shot six law enforcement officers Sunday in Baton Rouge, Louisiana — killing three — suffered from post-traumatic stress disorder, a source involved in the investigation told CNN’s Chris Cuomo.
Long joined the Marine Corps in 2005 and worked as a data network specialist, according to the U.S. military.
He was discharged at the rank of sergeant in 2010, after serving in Iraq.
The source also told CNN that Long had filled a prescription for Ativan, an anti-anxiety drug, as recently as June.
He also had prescriptions for Valium and Lunesta.