Well what about the Innocence Project and all the false narratives it has uncovere? Do some web searches around this kind of stuff and I think the US crime statistics also become similarly unreliable. Maybe look up Ken Dilanian, Gary Webb, Steven Avery, Michael Hastings, etc. Our policing force also has corruption and its share of false narratives. There are a lot of cases like this.
http://articles.latimes.com/2007/nov/09/world/fg-autopsy9