A Portland man was arrested Wednesday after authorities say he admitted to raping his fiancée’s dog, which later was euthanized after the sexual assault caused internal injuries.

Fidel Lopez, 51, told Portland police that he and the dog, a Lhasa Apso mix named Estrella, were lying in bed last November while his girlfriend was out, and he got upset when she wouldn’t respond to his calls and texts, according to a probable cause affidavit. Lopez said he’d been drinking alcohol at the time and “out of anger” sexually assaulted the dog, the affidavit said.