A local teen charged with setting the fire that destroyed a workshop near downtown Dexter has a preliminary hearing next week.  18-year-old Timothy Keeling of Dexter admitted to the arson, and told local police he also had set fires at his grandmother’s home in Saint Louis and at a home in Bernie.  Firefighters responded to a store at Stoddard and Sassafras Streets at around 6:40 AM on the 17^th. The shop was fully engulfed and deemed a total loss.  Fire crews suspected arson and two witnesses led to Keeling’s arrest.  The teen admitted to setting the fire with a cigar because he was depressed.  Keeling is charged with felony second-degree arson.  He is in jail on a 50-thousand-dollar cash only bond and will appear in court on the 12^th in Bloomfield.