The change adds nitrogen hypoxia to Mississippi’s legally authorized execution methods. Under this method, nitrogen is used to deprive a person of oxygen, causing unconsciousness and eventually death.
Mississippi’s move places it among a small group of U.S. states that have enacted laws permitting the method. Alabama is also scheduled to join the group when its legislation takes effect in October, potentially bringing the number of states with nitrogen-execution laws on the books to eight.
The expansion has intensified the long-running American debate over capital punishment. Supporters say states need alternative methods when conventional execution methods become difficult to carry out, while opponents argue that nitrogen hypoxia raises serious ethical, medical, constitutional and human-rights concerns.
The issue is particularly controversial because execution methods must comply with constitutional protections against cruel and unusual punishment. Courts have therefore faced increasing challenges over whether newer execution techniques meet that standard.
Mississippi’s legislation represents another development in the changing landscape of the U.S. death penalty, as individual states continue to adopt different approaches to capital punishment and how executions are conducted.
