Louisiana plans to use nitrogen gas to execute death row inmate Jessie Hoffman next week. Here's what to know about the method and why its controversial.

What is it like to be executed by nitrogen gas? Dr. Jonathan Groner, a medical ethicist who studies capital punishment, has ...

Louisiana's mask is a full-face respirator similar ... During a hearing last week arguing whether nitrogen gas was a constitutional method, medical experts faced off over whether death by nitrogen ...