The police are using modern technology now more than ever to find and arrest criminals. With heat sensing devices to online Facebook accounts, technology is assisting law enforcement to gather evidence and to make arrests. The article hyperlinked below describes how a woman stole items from a boutique and then posted pictures of herself on Facebook wearing the stolen items. At trial, the State would have to prove that the woman stole the items, and they would probably choose to use the photographs of her from her Facebook page as evidence.
However, in a hypothetical situation where there was only a statement of "I stole clothes from the boutique", there would be an issue of proof as to whom the Facebook account belonged, who posted the information, and if there were any other evidence to support the statement. Illinois law states that a confession alone, without more, is not enough to convict someone beyond a reasonable doubt. However, to all those charged with a crime out there, posting a picture of yourself in a public forum with the stolen items is probably not the best idea if avoiding an arrest is important to you. http://thesouthern.com/news/local/facebook-posts-lead-to-charges-of-retail-theft-for-west/article_e5a77d28-9ce6-50b3-a599-fd22f742c35a.html