Key facts about the death penalty in US
Executions in the United States are generally carried out by lethal injection, but Smith was the first person to be executed using nitrogen gas.
PREMIUM World
This handout photo courtesy of the Alabama Department of Corrections shows a mugshot of death row inmate Kenneth Smith, 58, a convicted murderer. (AFP)
By NewVision Reporter
Journalists @NewVision
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The first execution using nitrogen gas in the United States has put the spotlight on the country's use of capital punishment.
Kenneth Eugene Smith, 58,