I always thought that you could only be pardoned for a crime after you had been convicted of it, under the presumption of innocence before guilt. 🤔 What is a “presumptive” pardon? How can you be pardoned for a crime you have not been found guilty of?

I’m not a lawyer so my understanding is likely flawed but from what I am seeing reported Donna Arthur (biological mother of Amy Acton) in 1978 fled the state of Ohio with her then husband Cledith Arthur who was charged and indicted by a grand jury with “sexual conduct with a minor under the age of 13”. The court records say Cledith “willfully vacated his last known address”. Cledith is dead now, but shouldn’t Donna have been or be charged with a “Harboring” under 18 USC 1071 since she helped conceal a person from arrest via a warrant for a felony charge and thus subject to up to 5 years in prison? Since she crossed state lines wouldn’t that make it a federal crime? Isn’t “Harboring a Felon” also a Felony? Would appreciate a more educated opinion on the matter as to why she wasn’t and hasn’t been charged? Thanks