miller. >> i find it unbelievable because bp and their subcontractors had relationships with all of local law enforce many. they had the opportunity and ability to clearly check all of the people that they were hiring and bringing in to ensure the safety of the public. >> reporter: if anyone checked roberts robertson's background they would have found a lengthy criminal history and he was still on probation for a felony. instead he was made a supervisor. we are in mississippi to talk to a local sheriff. several weeks before this incident, sheriff mike byrd said he met with bp's local head of security about why bp was not doing background checks on beach cleanup workers. >> i asked them directly, i said are you all doing criminal histories and background checks on these people. his answer reply was no, we are not. i said you are kidding me? he said month. there are so many of them, we were told to do drug screenings and that was it. i said, well, that's not good at