A mob snitch who couldn’t shoot straight easily pointed the finger at a reputed Colombo gangster on trial for murder. Dino Basciano took the witness stand in Brooklyn Federal Court to testify that he heard Frank (BF) Guerra was part of a hit team that successfully whacked Joseph Scopo in 1993. Basciano, 56, wasn’t much of a hit man himself, botching at least three rubout attempts. In one case, he shot Patricia Capozzalo, the sister of Peter (Fat Pete) Chiodo, telling defense lawyer Gerald McMahon, “I knew I didn’t kill her. She was still screaming when we left.”