A convicted felon, having served the prison time and paid any other penalites legally imposed under due process of law, should not be further penalized by denial of his/her right to posses the means of lethal self defense, i.e., a firearm. When the felony was a “white collar” crime, involving no threat of physical violence or death against a person, such an additional penalty makes even less sense, in addition to its violation of Second
Amendment rights.
And especially if his conviction (sometimes even a plea) occurred before 1996, it's certainly not fair to impose additional disabilities upon him ex post facto.