The sick part is, since he wasn't properly dispatched on site, he'll be processed through the system and freed because he is "ill" and we don't do anything substantive to contain the insane anymore.
When people have nothing to lose or live for, family, a house etc they can just keep repeating this type of behavior. The system forgives it. The system only works on people who have something to miss.
Whatever Giuliani did and whatever Bloomberg stopped the city from doing, the homeless are starting to pop up again lately.