I suspect the neck is already supported by the bed so you really can't bend the neck that far. Look straight up. You can do it without snapping your neck. Pressing on someone's head while they're laying down makes the neck bend very little.
Most killers aren't any good. Most killers kill one person and often it isn't premeditated. And even when it is, they make mistakes, they don't do enough research.
And killers who know what they are doing are unlikely to kill someone in this manner. It's slow, it leaves so much DNA behind, and knocking them out but not killing them is a very real potential.
And killers who know what they are doing are unlikely to kill someone in this manner. It's slow, it leaves so much DNA behind, and knocking them out but not killing them is a very real potential.