. >> robert good to talk to you, thank you for being with us to share yu viewer, robert freedman your views. >> workers comp costs the country tens of billions of dollars every year. illinois based private investigator bob keen makes his living busting the fraudsters. we went along for a wild ride. >> we think this goo i might be work, we're starting early crack of dawn to make sure we do catch him. >> track down and record suspected scammers collecting workers comp money. >> this is a construction worker. he thinks he's on vacation, collecting workers comp, being able to right his jet skis. >> keen says his clients including insurance companies, small businesses and major u.s. corporations have good reason to be vigilant. >> more than 80% of the investigations that we do we're catching people that are exaggerating their claims. >> among keen's surveillance videos of shame, a subject who said his traumatic brain injury kept him from working but apparently didn't stop him from playing golf and olandscaper apparently suffering from a debilitating shoulder injury chopping down and climbi