An Alabama death row inmate was executed by nitrogen hypoxia, marking the third-ever execution using the highly controversial method. Carey Dale Grayson was put to death on Thursday evening ...

(WKRG) — Carey Dale Grayson ... after about 10 minutes. Grayson had been sentenced to death for the brutal 1994 murder of 37-year-old Vicki DeBlieux in Odenville, Alabama.

Nitrogen gas had only been used in death row executions four times before Tuesday, all in Alabama. Last year, the method was used to execute Carey Dale Grayson for the killing of Vickie DeBlieux ...