Roger Ebert gives a strong review to 'West of Memphis,' on the West Memphis Three murder case. The opening:
Three young men spent 18 years in prison, one under a death sentence, for a horrifying triple murder they clearly did not commit. The apparent killer is still walking the streets of West Memphis, Ark. The documentary "West of Memphis" is the fourth film about one of the most heinous cases of wrongful conviction in American judicial history.
Do we need a fourth film? Yes, I think we do. If you only see one of them, this is the one to choose, because it has the benefit of hindsight.