I’m not sure you would have to prosecute Assange in order to get him to testify about Seth Rich and other Deep State crimes of which he has knowledge. Maybe it would make more sense to do it that way, but he could conceivably be pardoned before hand and still testify as a material witness in individual cases brought against the Clintons, DNC, etc.
:: he could conceivably be pardoned before hand and still testify as a material witness ::
The story of the Goose That Laid the Golden Egg is instructive here.