Here is some information on the "Brady Law."
http://www.bradycampaign.org/legisla...hecks/bradylaw
says something about mentally ill persons that have been "court ordered." I take this to mean persons that have been at some point in their lives hospitalized for mental illness so that they would not harm themselves or others? Also, note that unlicensed gun dealers such as those at gun shows can get around the background check.