Watch: Emergency calls from botched Christa Pike execution released

A series of emergency calls, obtained by the Associated Press, reveal delays in reaching Christa Pike during a botched execution in Tennessee.

The incident, which occurred in January, has raised questions about the state's execution protocol.

Pike, who was convicted of murdering a fellow college student in 1992, was pronounced dead 27 minutes after the execution began.

The Tennessee Department of Correction has not yet commented on the incident.