Tennessee failed in its attempt Wednesday night to execute convicted killer Christa Pike, leaving the woman in critical condition in a hospital and reigniting a debate over the future of lethal inject

Christa Pike survived two doses of pentobarbital during her scheduled Tennessee execution and was taken to hospital. The failed attempt has triggered an independent review and renewed questions over the state's lethal injection protocol.

Tennessee's attempt to execute Christa Pike by lethal injection ended with her being taken for medical treatment. The failed procedure prompted a halt to executions this year and renewed scrutiny of the state's protocol.

A federal appeals court halted the execution of Christa Gail Pike on Wednesday, about an hour before she was scheduled to be put to death in Tennessee.The 6th US Circuit Court of Appeals granted the...