The South Carolina Highway Patrol is investigating an early-morning hit and run crash that killed a pedestrian.Troopers were called to Piedmont Highway near Southside Circle in Piedmont at 12:49 a.m. Friday.The victim was found dead at the scene, troopers said.Troopers believe the victim was walking west on Piedmont Highway and was hit by a vehicle also traveling west. The vehicle then fled the scene, according