Columbia police said they are investigating after video surfaced of a Popeyes employee assaulting a woman outside the restaurant.CPD said officers responded to the Popeyes Louisiana Kitchen on Nov. 5 around 5:30 p.m. in the 800 block of Nashville Highway. They said they received calls of a disturbance and an assault.Video shows a Popeyes employee slamming a woman onto the concrete in the parking lot.Police identified the employee as 29-year-old Deriance R. Hughes. He was arrested Friday and charged with felony aggravated assault.