Why can't the governor pardon him already?
Only Hashem knows the answer, but there are answers that are consistent with common sense.
Murphy is a wimp. He is really scared of doing anything. (I have many proofs, and I've heard this from big media people.) He always takes the safer option. Thus, he has not yet pardoned ANYONE. He seemingly has aspirations to run for president (haha) and is afraid that people will use his pardons against him. ("Oh, he's soft of crime" etc.)