BOISE, Idaho (AP) — Police have arrested one of two men who they believe broke into an Idaho zoo the night a monkey there died from blunt-force trauma, but questions remain about how and why the animal was killed. Twenty-two-year-old Michael Watkins of Weiser was arrested Monday in Washington County on felony burglary and grand theft charges. A tip from a citizen led police to Watkins after identifying a hat found in the monkey's enclosure as similar to one Watkins was wearing the night two intruders were spotted at Zoo Boise. A security guard frightened away the intruders, then discovered the gravely injured patas monkey, which died a short time later. Boise Police said at a news conference Monday evening that Watkins sought care at a hospital for injuries to his upper torso sometime after the early Saturday incident.