in my mind that you don't replace them with people who don't have disabilities. >> reporter: the problem is sent serd in a little known federal program, ability one. along with its outsourced management group, source america, they manage and award about $2.3 billion in federal contracts every year. multiple sources say these two organizations are being investigated for an acute of such wide scale corruption among the worst case of financial fraud they have ever seen in a federal program. our sources say as many as half of the federal contracts under this disability program may be operating in violation of the law. >> the majority of the individual that were being hired were not severely disabled. >> reporter: though you are supposed to have 75% or more of your work staff be disabled severely disabled. >> in my experience ability one contracts i worked on maybe 10%, 20% were truly severely disabled.