This picture deserves a Pulitzer. The Cheshire cat grins are scary.
I can't get too excited about Brendan Dassey's mother complaining about "what was done" to her son. Its a ridiculous statement but I'll give a little slack to a parent who has just learned that her son has committed the act of a beast (actually worse; no animal would do something like this).
An otherwise good kid can be led astray by peers or adults. Maybe drink, use drugs, perhaps even commit a minor property crime. But even the most impressionable young man is probably not going to be persuaded that raping and killing a person who is crying and begging for her life is a good idea. That requires your own special monstrosity.