I read about Dr. William Sybers, a highly respected pathologist and chief medical examiner in Florida. He was convicted maybe eight? years after the death of his wife from him administering to her succinylcholine. (He wanted to marry his mistress but didn't want to split their six million fortune). He almost got away. The case was reopened because somebody made a fuss.
Then there was Mark Fuhrman's book on the Martha Moxley case that was crucial in reopening the case.
It's all about the DNA.