LOS ANGELES (AP) — The son of former Democratic Rep. John Conyers who’s a possible candidate for his father’s vacated U.S. House seat was arrested in February in Los Angeles after his girlfriend told police he body-slammed and then stabbed her during an argument, but prosecutors declined to bring charges.Documents obtained by The Associated Press on Wednesday show John Conyers III’s girlfriend had a small cut to her arm. Prosecutors said they didn’t have independent witnesses and didn’t believe they could prove the victim’s injuries weren’t accidental.The arrest was first reported by NBC.Conyers, 27, told police he accidentally stabbed her after she threatened him with a knife, he disarmed her and they struggled. The girlfriend said she grabbed the knife for protection after he body-slammed her, pinned her down and spit on her.