NOGALES (Tucson News Now) - A new top cop is on the job.
Derek Arnson was sworn in Monday afternoon as the city's new police chief. He's previously served as police chief for the Gila River Indian Community. He's also worked for the Arizona Department of Public Safety, including two years in the Governor's protection detail.
Chief Arnson replaces Jeffrey Kirkham, who resigned earlier this year to take a job with the Arizona Peace Officers Standards Training Board.
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