Difficult things...
An acquaintance of mine lost her 29 yr old daughter 3 years ago when a totally drunk idiot hit her motorbike with his van.
She died on the spot, her husband -who was behind her on the bike- was badly injured and transported by trauma helicopter to R'dam hospital.
He missed his wife's funeral and everything as he was in a coma.

The trial on that is still going. It had ended after 3 years and 3 different courts. He got 6 years he initially had gotten.
But... then his smart-@$$ lawyer objected to that, stating there was a technical hiccup with the sentence. It had been manslaughter and he claimed it couldn't be because blablabla...
The case was dismissed and has to go to court again, putting the entire family through all that misery a second time.

Now how would you feel if you're the parent or husband in such situation? Not sure. I'd want him to get as much prison time as possible, but would I wish him dead?
Difficult to fathom.

Thing is... does it alleviate your pain when such a person dies? I don't think so.
You don't get your loved one back.
The ego will be thrilled, 'there you go, you MF!!!" but the pain won't go away.