WICHITA, Kan. (AP) — No charges will be filed in the shooting death of a man accused of lunging at a Wichita police officer with a knife.

The Wichita Eagle reports that Sedgwick county District Attorney Marc Bennett made the announcement Friday. Icarus Randolph was fatally shot last July 4 while police were responding to a call from his family. Relatives described Randolph as a veteran who suffered from post-traumatic stress disorder.

Police said a stun gun was ineffective against Randolph. And Bennett says the officer “objectively and reasonably felt he needed to defend himself.”

Sunflower Community Action spokesman Djuan Wash says the activist group is “disappointed.” Wash says the officer should have de-escalated the situation, distanced himself from it, and gotten Randolph to a mental health facility.