Police Friday released, pending investigation, a homeless man they arrested Wednesday in a shooting case in Pearl City.  The 39-year-old suspect was arrested on attempted second-degree murder after he allegedly tried to kill a 49-year-old man with a rifle in Pearl City last month.  Police say the older man was shot and seriously wounded near the ABC Auto Parts off Lehua Avenue on November 4.  The victim managed to walk along a bike path to a home in Waiawa, where the resident called for help.