Tale of teen's betrayal:Music, murder, hugsBy Jacqueline SoteropoulosInquirer Staff Writer DAVID SWANSON / Inquirer Murder victim Jason Sweeney’s parents Paul and Dawn Sweeney (right) are escorted from the Criminal Justic Center by Leith Harris-Gray (left) and Dawn McBratnie of the Families of Murder Victims. Four teenagers planned the killing for weeks, listened repeatedly on the day to the song linked to mass murderer Charles Manson, and then came together for a "group hug" after they beat 16-year-old Jason Sweeney to death in a vacant Fishtown lot, according to alleged confessions from two of them.Yesterday, all four were ordered to stand...