LEWISVILLE, Texas — A 21-year-old man was found dead with multiple gunshot wounds in his vehicle on Saturday night, according to the Lewisville Police Department. Officers responded to reports of gunfire in the 1600 block of South State Highway 121 Business around 8:26 p.m.Upon arrival, officers discovered the victim in the driver’s seat and attempted life-saving measures, but he was pronounced dead at the scene by the Lewisville Fire Department. Detectives have taken over the investigation, working through the weekend to process the scene, canvass the area, and interview witnesses. The investigation is ongoing as detectives seek to determine a motive and identify any suspects, stated the department.The Tarrant County Medical Examiner will confirm the identity of the…..