An ex-convict is headed back to prison after being found guilty of fatally shooting a 17-year-old girl in May of 2011. A jury handed down its verdict against Leron Porter on Friday following a month-long trial. They deliberated only five hours. Police said Porter shot and killed Tiphany Tallo during a dispute with her older sister in their home that was allegedly over a boyfriend. Tallo's sister was stabbed and her mother assaulted in the attack carried out by Porter and several members of his family. He had been released from federal prison just two weeks before Tallo was murdered.