A Wyoming man accused of killing one man and wounding another at a detox center this weekend was reportedly resentful and “hunting” for homeless people he had observed drinking in local parks.

Roy Clyde, 32, was arrested Saturday after he entered the Center of Hope detox facility through a back entrance, walked into a client area, and shot two men who were lying down on mattresses inside: Stallone Trosper, who died on the scene, and James “Sonny” Goggles, Jr., who was wounded.

Clyde reportedly placed the gun down and walked back out of the detox center as other clients and staff members began barricading themselves in a bathroom. He was arrested not long after.

According to the AP, Clyde—a Riverton, Wyoming city employee—indicated that he was “tired” of cleaning up after the city’s homeless population.

According to police statement filed in court Monday, Clyde told investigators he had long been considering killing people he referred to as “park rangers.” In Riverton, the term “park rangers” refers to homeless alcoholics — most of them American Indians. Many come to the city from the surrounding Wind River Indian Reservation, where alcohol is illegal, and drink in the parks.

On Monday a judge ordered Clyde held without bail. He’s been charged with one count of first-degree murder and one count of attempted first-degree murder.