What happened in failed execution of Christa Pike - and what next?

Convicted murderer Christa Pike is receiving medical care after a failed execution attempt in Tennessee involving two doses of pentobarbital. The incident has sparked legal and ethical debates regarding the efficacy and humaneness of current lethal injection protocols.
Why it matters
The failure of a state-sanctioned execution raises critical questions about the death penalty, medical ethics, and constitutional protections against cruel punishment.
Figure caption, What we know after Christa Pike survived two lethal injections
US convicted murderer Christa Pike is in hospital and being given "life-saving measures" after Tennessee authorities failed in their attempt to execute her by lethal injection.
The case of Pike, whose attempted execution had already been the subject of a high-profile legal battle, has raised a number of questions.
These include what went went wrong, what happens next, and - for opponents of the death penalty - fresh concerns around the suffering of an inmate when an execution does not go to plan.
Pike, 50, was sentenced to death in 1996 for the murder of 19-year-old Colleen Slemmer, an attack that was perpetrated alongside her then-boyfriend Tadaryl Shipp.
She was scheduled to be put to death on Wednesday evening, local time. The injections were allowed by the US Supreme Court at the eleventh hour after the legal battle.
Also covering this story
10 other newsrooms covered this event. We read each version separately.
U.S. Supreme Court clears way for Tennessee woman's imminent execution
Court halts Tennessee’s first execution of a woman in 200 years
U.S. appeals court halts Tennessee execution of Christa Pike
Execution of US murderer Christa Pike halted shortly before it was due to happen
US appeals court pauses execution of Tennessee killer Christa Pike, one hour before it was due to take place
Tennessee governor halts executions after Christa Gail Pike survives lethal injection
Tennessee To Execute First Woman In 200 Years: Inside Christa Pike Case
What to know about Christa Pike, first woman to be executed in Tennessee in more than 200 years
Christa Pike seeks firing squad, not lethal injection: Inside US executions - Al Jazeera
Tennessee to execute woman for first time in two centuries
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