Is there any evidence that he was conscious when he went through the dying process? I would say the drugs given to him had him completely unconscious and what was seen was the body's reaction.
I remember the first steer we killed, it was hanging in a tree behind the house and after cleaning it the next morning the muscles were still jerking some and I ask dad why, he said they are dying..........drugs aren't for quick death, seems I read with the old drugs used average time for death was 15 minutes.......one thing for certain.......that mofo will never rape/murder again now..........it should have been an hour instead of 29 minutes!