Precinct Seven Five
This is a brilliant documentary about a corrupt Brooklyn cop.
I have watched this series more than once and really enjoyed it.
Britain's Darkest Taboos
This is a must for any crime documentary fan. There are 5 seasons on Netflix at the moment, the series includes a range of different crime stories.
I haven't actually finished all the seasons but I'm up to season 2 and loving it. I thought it was going to be a spoof type thing but it's actually really funny.
If you missed this when it was on TV, its a brilliant series and Netflix have recently added the second series. Sarah Lancashire is just brilliant in it.
So that is just a few of my favorites but there are so many great programmes/films on Netflix that I will probably do another list soon.
If you have any recommendations please let me know in comments.