Marion ‘‘Suge’’ Knight, the former music mogul who created one of hip-hop’s leading labels and became the impresario of gangster rap, was arrested Friday on suspicion of hitting and killing a man with his truck and fleeing the scene of the crash near Los Angeles. Knight’s attorney said the founder of Death Row Records accidentally ran over and killed a friend and injured another man Thursday as he tried to escape attackers. Witnesses told police an argument between the men escalated into Knight ramming the pair, then changing direction and ramming them a second time. He turned himself in Friday and was booked on suspicion of murder and held on $2 million bail. The 49-year-old Knight, who has a long history of violence, started the label that helped solidify West Coast rap with Dr. Dre . The label also launched the career of Snoop Dogg and had Tupac Shakur in the last months of his life.