Check the browser history.
You double-click Netscape Navigator - your browser of choice - and check a few quick things. Bookmarks, none. History... some. You find a few things in the history.
Feb 14, 2006:
Yahoo! Search - HOW TO CLEAR YAHOO! SEARCH HISTORY?
Jan 16, 2006:
Yahoo! Search - DAMMITDAMMITDAMMIT
Yahoo! Search - north street diner
Yahoo! Search - norht street diner
Yahoo! Search - yahoo search
You recognize the diner immediately. North Street Diner, down on 12th. One of Criminal Mastermind's fronts.