Public support for the death penalty hit a two-decade low three years ago, when just under half of Americans polled backed it for people convicted of murder, down from nearly 80 per cent in 1996, according to the Pew Research Centre. Support for capital punishment ticked back up to 54 per cent last year, the centre found.
Capital punishment fell out of favour as researchers began to question whether it deterred people from committing heinous crimes and as more defense lawyers proved that their clients were wrongfully convicted.
Civil rights advocates also noted that there was a great racial disparity among inmates on death row and argued that the penalty was disproportionately applied to black men.
With pressure building to replace the capital punishment with life in prison, 21 states have outlawed the death penalty.
Advocates and inmates argued in lawsuits against state and federal governments that the practice was inhumane, and many of them focused on botched executions in which the drug cocktail used was ineffective or caused severe suffering before death.
Nearly a decade ago, drugmakers in the United States and Europe stopped selling to the federal government the sedatives that it had long used to render prisoners unconscious before executing them. In at least one case, a prisoner regained consciousness during an execution in which an alternative sedative was used.
On Thursday, Barr said that he had issued a protocol that replaces the three-drug procedure previously used in federal executions with a single drug, pentobarbital, which is widely available.
In 2015, the Supreme Court examined whether lethal injection was unconstitutionally cruel punishment.
The court upheld the use of lethal injection, but in a dissent, Justice Stephen Breyer urged the Supreme Court to take a fresh look at the constitutionality of the death penalty.
He said that there was evidence that innocent people have been executed, that death row exonerations were frequent, that death sentences were imposed arbitrarily and that the capital justice system was warped by racial discrimination and politics.
But only Justice Ruth Bader Ginsburg joined Breyer's dissent, and there have been no signs that a majority of the justices have qualms about the constitutionality of the death penalty. To the contrary, the court's five more conservative members have expressed frustration with what they say is litigation gamesmanship used by opponents of the death penalty to put off executions.
Written by: Katie Benner
Photographs by: Travis Dove
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