Tennessee's attempt to execute Christa Gail Pike on Wednesday night ended in an unprecedented situation after the state administered two doses of lethal-injection drugs but Pike remained alive.

Pike, 50, had been scheduled to die at Riverbend Maximum Security Institution in Nashville for the 1995 murder of 19-year-old Colleen Slemmer, a fellow student at a Knoxville Job Corps facility.

According to Tennessee corrections officials, the state followed its established execution protocol. The Tennessee Department of Correction later said Pike was transported to an off-site medical facility following the attempted execution.

Her attorneys said she was taken to a hospital by ambulance but that they had not initially been informed about her medical condition.

Media witnesses who observed the execution described a disturbing series of events inside the execution chamber.

According to witness accounts reported by multiple outlets, Pike complained about discomfort in her arm after the procedure began. Witnesses subsequently heard or observed heavy breathing, gasps and snoring.

At different points, curtains blocking the chamber were closed, limiting what journalists could see. Witnesses said they continued hearing breathing and snoring even after the curtains were closed.

The accounts prompted Pike's attorneys to seek court intervention during the execution process, arguing that she had survived the lethal-injection attempt.

The precise medical reason why the procedure failed has not yet been publicly established. Tennessee officials said the drug used in the state's protocol had previously been effective and that the protocol did not provide for additional procedures beyond those already carried out.

Pike's lawyers said in court filings that she received two doses of pentobarbital, the drug used in Tennessee's lethal-injection protocol.

The state's procedure allows for a second set of syringes if the inmate has not died after the initial dose. However, reporting indicates that the protocol does not specify another procedure if the person remains alive after the second set.

The situation has therefore raised questions about Tennessee's execution procedures and what happens when the established protocol fails.

The Associated Press, cited by the Los Angeles Times, reported that a death-penalty expert described the incident as an unprecedented failure, noting that while previous executions have encountered problems involving access to veins, surviving after receiving the lethal drugs is extraordinarily unusual.

The attempted execution followed an extraordinary legal sequence on September 30.

Pike's execution was initially scheduled for 10 a.m. Central Time. Shortly before that deadline, a three-judge panel of the U.S. Court of Appeals for the Sixth Circuit issued a temporary stay.

The appeals court said it needed additional time to consider Pike's legal arguments, including claims concerning whether evidence of alleged childhood sexual abuse had been adequately considered during her sentencing.

Tennessee then appealed to the U.S. Supreme Court, asking the justices to lift the stay.

The Supreme Court subsequently vacated the Sixth Circuit's stay, clearing the way for Tennessee to proceed with the execution. Justice Sonia Sotomayor, joined by Justices Ketanji Brown Jackson and Elena Kagan, dissented from the decision.

The execution ultimately proceeded later that evening.

Pike was convicted for the 1995 murder of Colleen Slemmer, who was 19 at the time.

According to court records and reporting, Pike and two other young people were involved in Slemmer's killing. Pike was 18 years old when the crime occurred.

She was convicted of murder and conspiracy to commit murder in 1996 and sentenced to death. One of her co-defendants, who was 17 at the time, received a life sentence with the possibility of parole.

Pike became the only woman on Tennessee's death row and was scheduled to become the first woman executed by Tennessee in more than two centuries.

Her lawyers had argued that her history of childhood sexual abuse and other mitigating circumstances deserved greater consideration during the legal proceedings.

Following the failed execution, Tennessee Gov. Bill Lee announced that the state's remaining scheduled execution for 2026 would not take place.

Lee ordered a comprehensive third-party review of what happened during Pike's execution attempt.

In a statement, the governor said the state has a responsibility to carry out legally imposed sentences in a manner that is lawful, constitutional and effective.

The decision means the failed Pike execution is likely to trigger a broader examination of Tennessee's lethal-injection procedures.

Pike survived the execution attempt and was transported from the prison to a medical facility.

Her immediate medical condition was not publicly disclosed in the initial reports, and the legal consequences of the failed execution remain unclear.

The case could also generate further court proceedings as attorneys examine whether and how Tennessee can attempt another execution following the failed procedure.

For now, the state has suspended its remaining executions for 2026 while officials conduct an independent review.

The Christa Pike case has placed Tennessee's execution procedures under renewed scrutiny.

The state's attempt followed a last-minute Supreme Court decision allowing the execution to proceed, only for the lethal-injection process to end without Pike's death.

With Pike transferred for medical care and Tennessee ordering an independent review, authorities will now have to determine what went wrong and whether changes are required to the state's execution protocol.

The case also leaves unresolved questions about Pike's pending legal challenges and whether Tennessee will seek another execution date.