May have been mentioned here before but I have just watched the 2008 limited UK series Criminal Justice on Netflix. Series 1 is five episodes and truly excellent IMO - has some well-known UK actors. Series 2 is also five episodes but totally different story line - good but not as great as S1.
There was an American remake of this entitled 'The Night Of' starring John Turturro with the story taking place in New York. It too was excellent (unusual for a US remake of a Brit show) and well worth a watch even if you have seen the original.