A Delhi University student has been arrested after he mowed down a man with his speeding BMW car here, police said on Saturday. Police said the accident happened on January 10 and the accused was arrested the next day but later released on bail. The hit-and-run incident was captured on CCTV cameras. "The accused student, Abhinav Sahni was behind the wheels. He was accompanied by his friends on the day of accident," a senior police officer said.