Christa Pike, a Tennessee woman serving a murder conviction, remained unresponsive and dependent on mechanical ventilation after two doses of pentobarbital were administered during an execution attempt on 30 September that did not result in death, according to a court filing submitted by her attorneys on Friday, 2 October.

Pike, 50, received a death sentence in connection with the 1995 killing of her former classmate Colleen Slemmer. Two doses of the lethal agent were administered, yet those present noted that she appeared alert well beyond the anticipated timeframe, with audible snoring sounds detected from her shortly afterward. An ambulance transported her to a local hospital.

By Thursday evening, Pike was on a ventilator and had not regained consciousness, her attorney Luke Ihnen confirmed in a written statement, which also noted that hospital staff were working to stabilise her condition. Testimony described both of Pike's arms as visibly inflamed, with skin blistered and burned.

Court documents filed separately with a federal appeals court revealed that state attorneys, responding to her legal team's attempt to halt the procedure after complications arose, took the position that the Department of Corrections bore no duty to provide life-preserving treatment to her. The Tennessee Department of Corrections stated in its position that each step of the state's established execution protocol had been observed.

Pike's execution came at the end of a day marked by court proceedings and legal motions. Grounds put forward by her defence team included her age when the offence took place, a history of mental health difficulties, childhood sexual abuse, and post-traumatic stress disorder — all raised in a bid to secure a reduced sentence.

Governor Bill Lee, who had previously chosen not to grant clemency to Pike, placed a hold on further executions through the close of the year, citing a review of the state's execution procedures. The procedure marked the second time within the calendar year that an execution attempt in the state had not been completed. A prior attempt was brought to a stop that May after medical personnel found no accessible vein through which to administer the injection to Tony Carruthers.

Attorney Spivey, who serves as Pike's legal counsel, argued in a commutation request that his client had faced a degree of suffering beyond what any other individual had experienced under the US death penalty system. Robin Maher, who leads the Death Penalty Information Center, noted that no prior case in the modern era offered a useful point of comparison for what unfolded during Pike's execution, describing the lethal-injection procedure as one that stood outside anything previously documented.

Volker Türk, who leads the UN human rights office, directed an appeal to Tennessee authorities urging them to halt any further pursuit of Pike's execution. Speaking to a local news outlet after the procedure was halted, May Martinez — Slemmer's mother, who witnessed the execution — said state authorities had let her family down and that an apology was owed to her.

Martinez, who travelled from Florida to Tennessee, expressed a desire for justice to have been served. The president separately raised questions about why the execution had not proceeded as intended, describing the process as one that ought not to present any real difficulty.

Tennessee had not put a woman to death in more than two centuries, and the scheduled execution would have been the first to break that stretch. Data compiled by the Death Penalty Information Center puts the number of women put to death in the United States at 18 in the period from 1976 onward.