Tennessee hasn't ruled out executing Christa Pike again. Her condition could stop it.

Tennessee's top prison official is stepping down after the state's failed attempt to execute Christa Pike, Gov. Bill Lee announced Saturday.Correction Commissioner Frank Strada will leave this month. In a statement, he said resigning was "in the best interest of Tennesseans" while an independent review examines what happened Wednesday, when Pike survived two doses of pentobarbital.Strada said he still believes the state "carried out its responsibilities in accordance with the established protoco