In Japan, during the Tokugawa regime, criminals were regularly tattooed to distinguish them from the general population. There was no going back from your big mistake; no hiding in anonymity; no chance of a feel-good, big hug reintegration into society. (The only downside was that the practice lowered the status of tattooing in the country and the higher culture art form that eventually developed never recovered from having taboo and dark connotations. )
Anyway, my thought: If you kill a child and it's proven beyond doubt (i.e. via DNA) you get a free huge fucking face tattoo like Anthony Ray Stockelman on the state's dime. I'm willing to bet somewhere, some arteest is firing up a tattoo gun for the guy who killed Holly Jones as I type...
Ahh, revenge. It can, indeed, be sweet when perpetrated on a piece of human trash.