A driver was driving drunk when he crashed into a car in Camden County Thursday night and killed its passenger and critically injured its driver and three others in the vehicle, authorities said. The investigation began just before midnight when officers from the Somerdale Police Department responded to a crash at the intersection of White Horse Pike and Cedar Avenue, according to a release from the Camden County Prosecutor’s Office. Detectives determined that a car being driven by Gerard Norum, 51, of Blackwood, was traveling west on the White Horse Pike when he crossed the double yellow line…