why not to buy from street vendors

Almost everyday I work I walk past the corner of State and Madison, and never really though twice about it until today. Everyday there was this man on the corner selling newspapers. Not that I ever bought one from him, but he did have every paper imaginable to sell. He would often say hi or something along those lines when I walked past. Well apparently he sold cigarettes too for five bucks. Stolen of course, but a lot of the people I work with used to buy from him. Well this is how i come to learn he's been gone for days. Arressted in NY for murder, after fleeing the Chicago nine days ago because apparently he stabbed a women 62 times and left her in his apartment. http://cbs2chicago.com/local/local_story_138140025.html The guy looked a lot more normal sitting on the street corner everyday. If one could look normal sitting on a street corner. He had really long dreads before and there was a picture of him in the sun times today. I think people actaully saved the paper at work.
Moral of the story is don't buy anything from people selling things on the side of any street. After all if you can be wanted for murder in NY and still right in the middle of Chicago. He was even arrested once. Crazyness. Just crazyness.