YUKON, Okla. (KFOR) - The Oklahoma Highway Patrol has issued an Endangered Missing Advisory for 44-year-old Matthew Heil. Matthew Heil. Image courtesy OHP. According to OHP, Heil is 6'1", 161 pounds with brown hair and hazel eyes. He was last seen wearing a red plaid shirt, blue jeans and no shoes near the 400 block of South 10th St. in Yukon around 10:45 p.m. Wednesday night. LOCAL NEWS: Firefighters battle duplex fire in Oklahoma City metro Officials say he may be riding a bicycle. If seen, call 911.