HOUSTON (AP) — Louisiana is set this week to execute a man by nitrogen gas ... have used five different execution methods: lethal injection, electrocution, lethal gas, firing squad and hanging.

The bill comes as public support for the death penalty is at a five-decade low and some states have encountered difficulties ...

If Louisiana carries out the execution, it would join Alabama as the only two states to use nitrogen gas to put a prisoner to death. Lethal injection has been the preferred method in the modern ...