There is a show on Investigation Discovery called Evil Kin.
Criminal Minds Season 12 Episode 16 looks like it might play out an awful lot like one of those episodes.
In our exclusive clip below, Alvez and Rossi are going over the possibilities of a suspect for a vicious case.
Educated, gainfully employed women are all found at nightclubs with alcohol and drugs in their systems.
The drug makes the women feel empathy. Alvez calls it a love drug. That's a terrible thought in itself, right?
The guy is likely a sadist, meaning he's punishing the woman and enjoying their pain.
But what if you were the mother of such a man, discovering the writings of the son you now believe to be a madman?
A "bone crusher"?
That would be a tough one to get over, but the BAU is going to meet one such mother, and you can catch a glimpse of her evidence and who she is in the exclusive clip below.
If you watch Criminal Minds online, then you might be waiting to here this, and I'm sorry to announce that elsewhere in the hour, Spencer will getting more acquainted with his new home, prison.
Who he's going to be when he gets out of this mess (if he gets out) will be something to see.
Watch the clip and be back here after Criminal Minds airs at 9/8c on CBS for a full review.