Implicit in the last post: if you're a criminal, mentally ill, a DV perpetrator (and, yes, someone will have to speak out) - you are permanently banned from possessing a firearm. (I'm open to the idea that the mentally ill MAY be able to become stable enough to possess certain firearms with restrictions.)
And that ban means that if those prohibited persons are in possession, and, after being accorded the presumption of innocence and requiring that the DA proves guilt beyond a reasonable doubt - there are those rights too - the person is found guilty - he/she gets a long prison sentence/commitment to a mental institution and lifetime supervision thereafter to assure, to the greatest extent possible, that he/she never possesses a firearm again.