MALVERNE - A victim of a deadly Southern State Parkway crash was laid to rest today as officials continue to investigate what caused the wreck. Christopher Khan, 18, was laid to rest today. The teen was one of four killed early Monday morning on the Southern State Parkway near Malverne. The driver, 17-year-old Joseph Beer, is the only survivor of the crash. Officials say the teen was illegally driving with a learner's permit. He was released from Winthrop University Hospital last night. Nassau District Attorney Kathleen Rice says her office is waiting for toxicology reports and a possible black box from the car in order to determine whether drugs or speed played a role in the crash. She wouldn't comment on a New York Post report that Beer was high on pot when he lost control of the car. Rice says it's too soon to determine whether charges will be filed.Police suspect Southern State Pkwy. crash driver was high, speedingCops: 4 dead in Southern State Parkway car crash