Suffolk Police say they arrested a Mastic Beach man on charges including DWI after leaving the scene of a crash that seriously injured a motorcyclist in Shirley. Authorities say 36 year old Thomas Dudley was driving northbound on the William Floyd Parkway, near Lawrence Road, just before 6pm, when he rear ended a motorcyclist on Wednesday, July 1st, 2020. Cops say Dudley fled the scene but was located a short time later. The motorcyclist, 52 year old Robert Engel, of East Northport, was transported to a hospital for treatment of serious but non-life threatening injuries. Dudley, was charged with DWI and Leaving the Scene of an Accident with Serious Physical Injury. He is being held overnight at the Seventh Precinct and is scheduled to be arraigned at First District Court in Central Islip on July 2.