see how they turn out. this morning, there is a new outrage over how bp has handled the gulf oil disaster. a man who supervised oil cleanup workers in mississippi is in jail charged with raping another employee. a cnn investigation uncovers his criminal history and raises questions whether this incident could have been prevented by just doing a simple background check. special investigations unit correspondent abbie boudreau is looking for answers from bp and the company who hired this guy. >> reporter: one of thousands of cleanup workers who descend order the gulf coast was this man, robertson. he was in charge of numerous work others this now deserted mississippi beach. the problem was all of these people who coming to town were strangers and residents here had no idea who they were or where they were coming from. apparently they had good reason to be concerned. robertson was convicted of a sex offender. and he was breaking the law by not telling local law