Kenneth Eugene Smith, 58, was pronounced dead at 8:25 pm on Thursday after being administered pure nitrogen gas through a face mask. "Tonight, Alabama causes humanity to take a step backward," Smith said moments before inhaling the nitrogen gas. A mask resembling what a firefighter would wear was then put on his face before he was administered the dose of 100 percent nitrogen gas. Hedgepeth shared how he saw Smith react to the nitrogen gas. FINAL HOURSBefore the execution, Smith spent time with family members and Reverend Hood.