There was a 30-minute delay in treating convicted murderer Christa Pike after her failed execution late last month, according to emergency 911 calls between first responders and Tennessee prison officials.

Pike, 50, received two doses of a lethal injection on Sept. 30, but she unexpectedly survived both injections. The reason remains unclear. Confusion appears to be a recurring theme surrounding Pike’s botched execution, and that is evident in the events that unfolded thereafter.