child's perception of it. the government point man to the disaster admiral thad allen said bp will go ahead with drilling the relief well. they're considering other options. he said some tests indicate the bottom kill procedure to seal the damaged well may not be necessary. meantime, a man, a contract worker who supervised oil cleanup workers in mississippi is in jail tonight, charged with raping another employee. a cnn investigation tonight uncovers his criminal history and raises questions about whether this incident could have been prevented by doing a simple background check. special investigations union correspondent abbie boudreau goes looking for answers and here is what she found. >> reporter: one of the thousands of cleanup workers who descended on the gulf coast was this man, rundy charles robertson. he was in charge of numerous workers on this now desserted mississippi beach. the problem was all these people who were coming to town were strangers and the residents here had no idea who they were or where they were coming from.