Lawyers have said that Christa Pike, who was sentenced to death in America, is now "conscious and speaking."
Pike was hospitalized last week after a failed attempt to execute him by lethal injection.
Pike's lawyers have said that their 50-year-old client is also being kept in handcuffs in the hospital.
Pike was sentenced to death in 1995 for the murder of Colleen Slemmer. Last Wednesday, two attempts to give her a lethal injection in Tennessee failed and she survived.
She was taken to the hospital, where she remained unconscious for several days. During this, the doctors took out the injected chemical from his body.
Experts and his legal team say that his recovery is unprecedented. She is believed to be the only person to survive the lethal injection.
His lawyers described the improvement in his condition as "medically unprecedented". But he said that nothing is clear at the moment about Pike's chances of full recovery.
Deborah Deno, a criminologist and professor at Fordham Law School, said she was "completely surprised" by Pike regaining consciousness and speaking.
Dano told the BBC that there were seven other cases in which prisoners escaped the scheduled death sentence. But in these cases it was not possible to inject anything into the veins of the prisoners.
He said, "Pike is the only person who had any kind of toxic substance injected into his body. He did everything he was supposed to do under the death penalty procedure and it still didn't work. This has never happened before."
What happened in the failed attempt to execute Christa Pike and what will happen next?
Authorities have not yet said whether they will seek to re-execute Pike. He has also not told what went wrong after giving him the injection of pentobarbital chemical.
Tennessee Governor Bill Lee has halted all death sentences for the rest of this year. The head of the state prison department has said that he is going to resign.
Pike was 18 when she, along with her then-boyfriend Tadaril Shipp, beat, tortured, and murdered 19-year-old Slemmer. Both of them met in an employment training camp run for youth facing difficulties.
Pike's lawyers will appear in a Nashville court on Wednesday. He will also hold a press conference outside the court.
Dr. Joel Zivot, an anesthesiologist who advised Pike's rescue team, said Tuesday that the chances of recovery from lethal injection are slim.
"The vast majority of people who are given lethal injections die. In fact, almost everyone except Christa has died. So, her survival is ... unusual," he told the BBC.
But he said there is still a lot of uncertainty.
Zivot said that how much pentobarbital reached Pike's body, what was its level in his blood after the injection and what his recovery would be like... all these things are not yet known.
"I wouldn't say that all the major risks to pike have been averted," he said.
Zivot had previously said that the two doses of pentobarbital given to him last week were enough that if it had entered the bloodstream, "he would certainly have died".
Zivot said one possible explanation is that instead of entering the pike's bloodstream, the pentobarbital may have spread into the tissue beneath its skin.
Zivot said last week that the likelihood of Pike suffering serious brain damage was "very high." He also believed that it would take about a week to fully understand his condition and conduct a neurological examination.
Pike's lawyers had previously warned that his medical history and physical structure meant he would have experienced "unnecessary" pain and suffering during the fatal injection.
According to him, Pike has thrombocytosis and his veins are also small.
According to the Death Penalty Information Center, which tracks such cases, more than a third of death penalty cases carried out across the US in 2022 were either bungled or had some problem.
In cases of fatal injection, such events are usually caused by difficulty getting the IV into the vein, although the causes vary from person to person.
According to the Death Penalty Information Center, all of the failed cases filed with them occurred before lethal drugs were administered.
