Authorities in Michigan said a suspect in a McDonald's robbery was arrested three months later after returning to the same restaurant for a meal.  The Oakland County Sheriff's Office said the 40-year-old man, whose name was not released, was going through the drive-through at the Pontiac fast food restaurant at 7:57 p.m. Saturday when a worker identified him as the same man who committed a robbery there Oct. 5^th.  The man was arrested near the restaurant and taken to the Oakland County Jail on pending charges, the sheriff's office said.