>>3860365 pb
>>3860365 pb
This discussion of pardons in Forbes (below) seems to indicate that is possible to pardon someone for past crimes if that person is currently under indictment or prosecution. It seems to assume, also, from my reading, that it is not possible to give someone blanket immunity for any possible crime they may commit in the future.
"The Supreme Court wrote that the President may exercise the pardon power after the commission of the criminal offense, before or during legal proceedings, and after conviction and judgment. In fact, so long as the President grants a pardon before conviction, then doing so prevents any of the “penalties and disabilities consequent on conviction from attaching” to the pardoned person."
https://www.forbes.com/sites/jacobfrenkel/2017/07/21/president-trump-can-preemptively-pardon-his-advisors-and-family-but-will-he/#65667bff6c3b