We don't have a pardon process. There was a process by which people could have their previous convictions overturned by a court.
I know we're short on time, but briefly, there's a problem with that, because we rely so heavily on plea bargains. Often the prosecutor will come in and say, yes, we let this person plead possession of less than an ounce or possession of less than six ounces. We don't, however, know that this is what in fact happened. There might also have been cocaine; there might have been a larger amount and we let them plea to a smaller amount. There has been push-back from prosecutors about undoing and unravelling prior convictions.