How does lethal injection work and what drugs are used?
LETHAL injection is the preferred method of execution in 28 US states that have the death penalty, but the drugs used can differ across the country.
Lethal injections are also used in federal executions, and a man named Brandon Bernard was scheduled to be given one in Indiana on December 10.
is backing a campaign to stop his execution which was scheduled to take place on December 10.
He was involved in the killing of two youth ministers in 1999 when he was a teen.
Campaigners say that, at the time of his conviction, both prosecutors and jurors had an incomplete picture of Bernard and his background.
The group, all teenagers at the time, held the Bagleys at gunpoint and robbed them before shooting them.
They then placed their bodies in the trunk of their car and torched it.
A federal jury found Bernard guilty in 2000 of two counts of murder.
He was then placed on death row.