Chubbuck police are looking for a man with an outstanding arrest warrant for failure to appear on an earlier charge of misdemeanor "encouraging juvenile violations".
Police believe Matthew Shane Sierra, 27, is with a 17-year-old Chubbuck girl. She was last seen by her family Dec. 26, 2012.
They said a domestic violence order is in place prohibiting Sierra from having any contact with the girl.
He is described as being a white male, 6' 1" tall and weighing 165 pounds. He has brown hair and green eyes.
Anyone with any information about Sierra is encouraged to contact their local law enforcement agency immediately.