DENVER - A nationwide search is underway for a former long-distance trucker who is suspected in the deaths of three people in Colorado and is likely on the run rather than hiding out, authorities said Thursday.

Harry Carl Mapps is wanted on charges of first-degree murder and arson in the Nov. 27 shooting deaths and a fire at the home where the bodies were found, Pueblo County Sheriff Kirk Taylor said at a news conference in Pueblo.

Mapps, 59, was a friend of one victim and had been staying with him, authorities said. Taylor said the fire was set to cover up the shootings.

He said investigators have some ideas about where Mapps might go but declined to provide details.