you, but give me a couple of minutes. reporter: so i m not going to shut the door and never seen you again? i promise. reporter: okay, he promises. so we waited. but they only slipped us a note through the door referring us to the corporate headquarters. did you realize you were hiring people who were registered sex offenders? thank you, ma am. reporter: this is when the blame game begins. first, we spoke with the general counsel for aerotek by phone who said aerotek wasn t the one that decided not to do background checks. we re not liable for anything that happens. once we deliver the people to be supervised by our client, we don t have anything to do with them anymore. miller environmental group, which oversaw the cleanup and hired aerotek did not return our phone calls. then bp, which was paying for the beach cleanups, told us in a statement it normally checks its own employees, but this was not done for all contractors in this response. the responsibility lies with the