A pizza deliveryman was killed Saturday night when his vehicle plunged over an embankment as he was returning from a delivery.The victim, Joseph “Jody” Partin, 27, of Gruetli-Laager was pronounced dead on arrival at Saint Thomas River Park Hospital. Investigators say he had been thrown from his car as it rolled down the embankment off Francis Ferry Road. He was not wearing a seatbelt.“It’s one of those cases where if he’d been wearing a seatbelt, he’d still be with us today,” said Highway Patrol Sgt. Billy Prater of the crash, noting there were no signs of drug or alcohol use.According to the report filed by Highway Patrolman Rodney Whiles, the crash was discovered around 11 p.m. when a couple of passersby happened to notice headlights shining up from the bottom of an embankment on the side of Francis Ferry Road.