Dallas DA Craig Watkins on Witnessing His First Execution: 
Watkins:  No one’s talking. No one’s saying anything. And then you notice that  the condemned, he starts to turn this bluish color. So I guess that’s  when all his functions have stopped. And then a doctor walks in and  takes his vital signs and announces that the person is—he looks at the  clock and announces, “The person died at 6:22.” And then they open the  door and we all walk out. Very clinical. It gives you the appearance  that the condemned is in control, when in actuality he is not. But it  does give the appearance that the person is in control. It’s very  peaceful, very respectful toward the condemned.
And I can  understand when the victims have a hard time dealing with the process as  it is now, because it didn’t appear that there was any pain or  suffering. If there was any, I couldn’t see it. It just seemed as if it  was like a medical procedure, like when you get anesthesia and you go to  sleep. That’s the way it appeared. And so when it’s over, they  pronounce the person dead, they pull the sheet over his head. When you  walk in the room, they lock you in.