(Wisconsin Dells, WI)  —  A federal prosecutor says human traffickers are now preying on small-town Wisconsin. More than 100 law enforcement officials and advocates have been in Wisconsin Dells this week for a special state-wide conference on Human Trafficking.  Assistant US Attorney Diane Schlipper says she thinks trafficking is “evolving,” though she says she hates to use that term.  Schlipper says traffickers are trolling Facebook, looking for victims.  She says there’s no reason law enforcement agencies can’t also use Facebook as a tool to find out who’s involved. The two-day seminar wrapped up Thursday at Chula Vista.