I bet 99.9999999% if not 100% of lawyers and judges have absolutely no idea about how bitcoin mining and blockchain network works. This would be the case where they'll have to judge what they don't know and won't be able to understand which argument is right or wrong.
We aren't students of school of law but we can logically say that there is absolutely zero chance that miner is guilty. It's miners duty to mine bitcoin block and keep mining fees. I would even say that if miner agrees to return fees to someone, they are probably part of money laundering. Why? Because, why would someone pay half a billion in fees and then ask miner for return? To launder money, that's how they do that. We can argue on this, right? Sure. But the best judge in this case is Bitcoin Whitepaper, it doesn't say that we should return fees to transaction makers. Instead, miners should keep them, it's their property.
How are you so sure that there's nil lawyers would have no idea about this kind of case? Is your superiority complex that bad that you think that other people that don't have an inkling of knowledge or their interests are outside of bitcoin don't have the idea what they can do with this? They don't need to know it, the clients and the defendants just need to tell the truth and everything that the court needs to know so they can make a case about it. Clearly you and I aren't a student that's involve with law but I don't just blurt conjecture with confidence. Not everything wrong with bitcoin is money laundering, it's been proven already that bitcoin's a bad cryptocurrency to use for that kind of activity.