A lot of questions and a lot of bullshit in this thread already....true G&O fashion.
Was he an organ donor? NO. Not eligible. He had cancer, and given that it was a 6cm HCC based on what he told us I bet it had already spread out of the liver and he just didn't say anything about it.
What did he die from? Best guess....multi-organ failure from hepatorenal syndrome. NOT a reaction to the Sorafenib or TACE he got. His liver was shot, His kidneys were shot....that means he probably died a very painful and terrible death. Kovacs by comparison would have suffered much less than Derek.
Re: AUTOPSY. Ultimately it is up to the patient's family (and the deceased wishes) unless there is a criminal investigation going on, that trumps everything. Personally, I have seen autopsies and they are disgusting. The "prosector" is basically a butcher that treats the deceased with about as much grace as McDonalds treats its' Grade A beef. They take EVERYTHING out (Brain, organs etc....) and once they have samples of everything they toss it all in a bag, tie it up and toss it back in.

DA it would seem lived hard and fast, but died slow.
Incidentally, anyone go to the funeral? Was it closed or open casket and did he go with a suit or cutoff T?
I could see DA wanting people to say "Damn, He is pretty jacked for a dead guy"