WICHITA, Kan. (AP) — The top prosecutor in Sedgwick County says he plans no charges against a Wichita police officer who fatally shot a man during a confrontation last year.

District Attorney Marc Bennett says the investigation of John Paul Quintero’s January 2015 death found that the officer who shot him acted in self-defense.

Bennett says that officers responding to reported disturbance confronted an intoxicated 23-year-old Quintero, and that Quintero failed to fall when he initially was shot with a stun gun. Bennett says that Quintero didn’t comply with the officers’ demands, and that the officer who shot Quintero believed he was armed with a knife.

Authorities have said an autopsy showed Quintero had marijuana, alcohol and meth in his system.

Quintero’s family has filed a federal wrongful-death lawsuit.