The civilian leader of the Multnomah County Sheriff's Office Search and Rescue team has been arrested for sexual abuse of a 16-year-old girl who was a volunteer on the team. Chief Deputy Jason Gates says Brandon Liggett, 30, was arrested Wednesday night. Liggett's job was to manage civilians on the team, and coordinate training and search and rescue missions. He’s charged with sex abuse in the third degree. A detective from the Oregon State Police is conducting the investigation.