FORT WORTH, Texas (AP) — A 911 recording and documents released Tuesday reveal more about the possible state of mind of the Iraq War veteran charged with gunning down a former Navy SEAL sniper and his friend at a Texas shooting range.

Eddie Ray Routh told his sister and brother-in-law that he and the two men “were out shooting target practice and he couldn’t trust them so he killed them before they could kill him,” according to a Lancaster police search warrant affidavit.