TAOS, N.M. —

Rainor Joiner confessed to the Taos County Sheriff's Office that he killed and mutilated 25-year-old Matthew McLaughlin in July.

Joiner explained that he brought McLaughlin to New Mexico to help him straighten his life out, as they had served in the military together. Joiner said McLaughlin was struggling with substances and had been bringing strangers to his house, which Joiner says he offered to McLaughlin.

As deputies were interviewing him, Joiner said this led to repeated requests for McLaughlin to clean up his act.

Joiner said he lost his temper after McLaughlin said something that angered him. "I was just so f------ pissed," Joiner said. "I really don't know what the f--- he said. He said something, and I just f------ shot him."

He then provided Taos County deputies

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