Christa Pike, a 50-year-old Tennessee death row inmate, was discharged from a hospital and returned to prison after surviving a failed lethal injection attempt.
Her lawyers said she remains under medical care following the September 30 execution attempt in Tennessee.
According to statements from Pike's legal team, she survived two injections of pentobarbital and was initially in critical condition.
She later regained consciousness, spoke with medical staff, and was transferred back to the Deborah K Johnson Rehabilitation Center.
Pike's lawyers said her recovery followed a period when they believed she could be brain dead and expected life support to be removed.
They said she later showed physical improvement, including walking with assistance and regaining some movement in her arms.
"She is grateful to the first responders and her medical team for their care in these extraordinary circumstances.
She is continuing to receive medical care at the prison, and we will continue to track her recovery," Pike's lawyers said in a statement.
The legal team said the failed execution created an unprecedented situation because Pike is believed to be the only person to survive an execution attempt involving lethal injection.
Tennessee officials have not publicly explained why the procedure failed.
"Physicians are encouraged by her physical recovery," Pike's legal team said in a statement.
Pike's lawyers said she suffered serious physical effects after the attempted execution, including pneumonia, swelling in her arms, and difficulty swallowing.
They also raised concerns about the psychological impact of surviving an execution attempt.
"Christa is dealing with the profound psychological trauma of having survived a failed execution, including the terror, pain and uncertainty of believing she was about to die," Pike's legal team said.
Earlier reports from her lawyers described Pike as struggling emotionally after waking in hospital.
Her first reported words after regaining consciousness were questions about her location and the people around her.
"I think she is angry and confused about everything right now," lawyer Randy Spivey said.
The execution attempt has prompted legal and political responses in Tennessee.
A judge ordered officials to preserve evidence from the procedure, including materials from the execution chamber, while Governor Bill Lee paused executions in the state for the rest of the year.
Pike was convicted in 1995 for the torture and murder of Colleen Slemmer, who was 19 at the time of her death.
Prosecutors said Pike committed the crime with her then-boyfriend Tadaryl Shipp, who avoided a death sentence because he was not legally an adult at the time.
Pike was 18 when Slemmer was killed after the pair met at a job training camp for low-income young people.
Her lawyers have spent decades challenging her sentence and have renewed calls for it to be changed to life imprisonment without parole.
