Staircase and wild wild country were both great. (as mentioned above)
WWCountry took me a couple tries to get into it (took a couple months to get through the first 2-3 episodes) but if you think Jonestown or Waco are interesting, def check it out.
If you've finished Staircase, do a little research you're mind might be changed, or not. (Don't google)
Also, recently realized the NBC show 'Trial and Error' is a comedy version of Staircase. (Season 2 of Trial and Error comes out in like a month - I think it will be based on another case)
Started watching 'Making a murderer'. It was interesting at first but doubt I'll finish it.