NASHVILLE, Tenn. (WKRN) — An ambulance is designed to save a life, but Wednesday night, one was called to Riverbend Maximum Security Prison after the State of Tennessee tried to end one. The failed execution of Christa Pike, who was sentenced to death for brutally torturing and murdering 19-year-old Colleen Slemmer in Knoxville in 1995, has raised a lot of questions, including why prison officials called emergency medical services so Pike could receive lifesaving care after attempting to execute her just minutes prior. Pike received two doses of the lethal drug, pentobarbital and survived on Wednesday. According to Pike’s attorneys,...