I can recommend a long series of 4 trials for the murder-for-hire of Dan Markel. But if you do commit to watching them all, you should watch the police interrogations of the ex wife and her ex boyfriend that happened before the trials. There are Dateline and 20/20 episodes about the case as well, that give a pretty good primer for the trials. The interrogations and testimonies are gold. Never a dull moment.
The other was the Karen Read trial (crooked Mass-hole cops), but that one was not as good as the Markel one, imo