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