Christa Pike remains unconscious and on a ventilator in a Tennessee hospital after a failed execution attempt. Her lawyer, Stephen Ferrell, said Sunday that her prognosis might not be known for days. Pike, now 50, was sentenced to death for a 1995 murder. Tennessee officials gave her two doses of a lethal injection drug Wednesday night, but it didn’t kill her. Her lawyers said her arms were burned and blistered from the drugs. Pike’s medical decisions are being made by someone with her power of attorney, whose identity remains undisclosed.