Flagstaff Police are looking for a missing 15-year-old boy in Flagstaff. Officials say Michael Walden is a student at Flagstaff High School and was last seen Tuesday at around 10:30 a.m. when he left his home on foot and hasn’t returned. Police say he may be hanging out in the downtown area. Anyone who knows Michael, and knows where he is, is urged to call Flagstaff Police at (928) 774-1414.