Framing by the justice system happens all the time. Adult DNA doesn’t get there by accident, but DNA results can get falsified on purpose.
I get that you really want to torture people while feeling morally justified, but consider the fact that torturing convicted criminals doesn’t actually help anyone, including the victim, and that you will inevitably wind up torturing an innocent person. Period.
Like I said, lock 'em up where they can’t hurt anyone - but torturing them doesn’t do anything except make sadists happy, and I don’t think that’s what we should be optimizing for in a first world justice system.