To err is human.

The "Criminal Justice" drama serial has been rightly praised as top-class television, but what message was it trying to get across? Well quite a few I think - not least the way remand prisoners are treated, but for me the main message is that the criminal justice system is not somehow bullet-proof and special, but just an ordinary system run by human beings, and human beings are subject to human failings, and can make mistakes. So it is inevitable that there will be errors. The worth of any system is how it deals with that inevitability. And even though, for dramatic effect, the programme somewhat exaggerated matters, it has to be said that the justice system doesn't score very highly in that regard.