The St. Louis County Police Department was just trying to do its due diligence in warning the community about known sex offender Robert Barteau, who had been violating the terms of his probation by loitering around a public park. Barteau had a long, ugly history of assault and sex crimes and had a tendency to buck the conditions of his release, so he could have posed a danger to the public. What they did NOT anticipate was that the Facebook post would become the greatest and most brutal roast venue in St. Louis County Police Department history.
Of course, the dude was a legit scummy piece of garbage, so that made the roast all the more satisfying - there's pretty much no one who deserves this kind of treatment more than him.
The posting has since been deleted (for....probably obvious reasons), but luckily it was all screencapped in time by Tumblr user Dragonley. So before you go committing crimes or violating the terms of your probation in St. Louis, be wary that you will be torn to shreds in the comment section and it will live on the internet FOREVER.