I think you should listen to More Perfect from Radiolab/ WNCY
More Perfect is all of the above, it also stands out with the way it sounds, much like the nature of the topic's it covers, it has a dark sound to it. That feeling, mixed with relaxed conversation draws you in from the get-go.
There's an uprising of programming about court cases in the US, be it Making a Murderer Serial or Untold.
All of these, while different, require similar things to be successful. This can include, but is not limited to:
A real story to tell and the patience to find it.
Anywhere but particularly in the US there is an abundance of court cases and trials that could be made into programmes. They will have had to research into many in order to find the gems.
Thoroughly committed research.
The ability to trawl through documents, interviews, trial tapes and talk to people.
Telling enough to keep the listener hooked.
Starting with unanswered questions, giving information that makes them think; 'But why?'
This one is a very good place to start.