immigration reform when the senate judiciary committee takes up the bill on thursday, a slew of amendments are expected before the bill can be taken to the full senate in june. the bill releasinged last month by four democrats and four republicans known as the gang of eight, it calls for boosting border security and offering a path to citizenship for an estimated 11 million people living in the united states illegally. bill: new concerns about a provision in the bill that requires background checks for people looking to become citizens. critics argue the checks just won t work. william la jeunesse live in l.a. on this. what did you find out? good morning. reporter: they want a background check that looks beyond u.s. criminal aldatabases and oppose a provision that allows criminal and gang affiliated people to stay and keeps their information confidential. supporters say there are always exceptions. with millions of illegal immigrants living in the so-called shadows, immigration