Reading that link posted previously, Tim 'sharky' Ward said the U.N. recognizes death by firing squad as a form of torture because it takes up to 15 minutes to die. Reading another news report, the procedure is that if they are not dead after the initial firing squad shooting, the person in charge walks up with a handgun and puts a bullet through their brains.
So you're tied there, three bullets in your chest, some bloke walks up puts a gun to your head and blows your brains out.