control policy, to be the drug czar who has received donations from pharmaceutical companies that are making a great deal of money from the sale of opioids. >> there was very little congressional opposition to this law at the time when it was signed by post. how did that happen if it contained an enforcement loophole? >> reporter: it's not entirely clear, but the investigation suggests the legislation ran through a protective cover under the idea there was nothing controversial in it. why did they do that? because these investigators found the pharmaceutical industry made generation donations to a good many campaigns while the law with his being developed and passed. but we just received a statement that we have to report here from the pharmaceutical research and manufacturers of america. what they have said is with regard to the recent washington post and 60 minute stories, we want to be clear that pharma did not support or lobby in favor of the act we're talking about here. and reports that pharma sent $40 million lobbying this bill are unequivocally false.