Source: New York Times
Nearly two decades after lawmakers began requiring background checks for gun buyers, significant gaps in the F.B.I.'s database of criminal and mental health records allow thousands of people to buy firearms every year who should be barred from doing so.
The database is incomplete because many states have not provided federal authorities with comprehensive records of people involuntarily committed or otherwise ruled mentally ill. Records are also spotty for several other categories of prohibited buyers, including those who have tested positive for illegal drugs or have a history of domestic violence.
The gaps exist because the system is voluntary; the Supreme Court ruled in 1997 that the federal government cannot force state officials to participate in the federal background check system. As a result, when a gun dealer asks the F.B.I. to check a buyer's history, the bureau sometimes allows the sale to proceed, even though the purchaser should have been prohibited from acquiring a weapon, because its database is missing the relevant records.