I appreciate the way the PRC government deals with drug traffickers, people who embezzled money from the government and murderers as well as rapists.
They simply execute them all.
This way there could be absolutely no “pardons“.
I'm not sure about the good old US of A - but you can get posthumous pardons in other countries .
Eg Soldiers who fought in WW1 got Shell shocked / Post dramatic stress syndrome and were shot for deserting. Or Gays - I think that famous English code breaker at Bletchley park may have got one . Alan Turing