Roger Clinton was pardoned for a 1985 conviction after having served his sentence. The pardon removed the conviction from his record, but the punishment had already taken place.

Similarly, McDougal had finished serving her sentences after conviction by the time she was pardoned.

Rich did get pardoned before standing trial, but that was because he fled the country in 1983 when he learned there would be charges. So this is a case of a pardon preventing trial and punishment.