BRENTWOOD - A suspected drunk driver accused of hitting a pedestrian and fleeing the scene is being arraigned today on DWI charges.Police say Alicides Melgar hit a man who was walking on Suffolk Avenue in Brentwood yesterday morning. Then, they say he hit three cars as he tried to leave the scene.His cousin tells News 12 Long Island that Melgar was drinking before he got behind the wheel.The victim is expected to be OK.Police: DWI driver strikes pedestrian, 3 cars in Brentwood