Getting word to me won't be necessary. I may not be terribly suited for fieldwork, but I'll gather what information I can on the matter. I'm assuming you're not completely used to 21st-century policing, and Torchwood's used to having resources the police don't. It'll be no problem at all to tap those for you, if you like, and I can talk to Marshall about seeing if there's anything to be found on what CCTV Chicago has.