RIVERTON, Wyo. — A parks employee in a central Wyoming city who said he was incensed by homeless people drinking in parks slipped into a detox center over the weekend and shot two men in the head as they were lying in their beds, killing one and critically wounding the other, authorities charge.

A judge on Monday ordered Roy Clyde, 32, of Riverton held without bail. Clyde is charged with one count of first-degree murder and one count of attempted first-degree murder. A preliminary hearing was set for July 29.

Riverton police Capt. Eric Murphy said Monday that Clyde is a 13-year employee of the City of Riverton. Murphy said Clyde called police after the shooting at the Center of Hope facility and reported it. Police arrested him nearby.

Clyde told investigators that he targeted the detox facility because he was tired of cleaning up after homeless people, Murphy said. “And basically he was angry at that, and that’s what precipitated him to go and do this violent act,” Murphy said.

Despite Roy Clyde’s reported complaint, there was no immediate indication that anyone inside the Center of Hope facility — including the victims — was homeless at the time of Saturday’s attack. Moreover, police say the center caters to all segments of the population with addiction problems.