BART police said they arrested a man who was armed with "a concealed pistol grip AR style rifle" on a train late Christmas eve, according to a social media post. The Facebook post said that on Sunday night at around 11:20 p.m., a train operator notified BART police after spotting a male bothering other riders on a Richmond-bound train. BART police officers intercepted the train at Fruitvale Station and located the man. The individual, identified as 35-year-old Oakland resident Archie Hansbury, was found to be in possession of a AR-style rifle he had concealed inside his pants. Hansbury was arrested...