The long-term effects are much worse for exonerees than for guilty prisoners.
For decades, the justice system has decided to live with ropey testimonies. Could that be about to change?
If even top judges can get it wrong when it comes to domestic abuse then perhaps it's time we all tried to better understand the nature of coercive and controlling behaviour.
Your memory of an event can be manipulated – and miscarriages of justice can follow.
Two inquests, millions of pounds, 27 years, 96 dead, one verdict: that police failures led to the 1989 Hillsborough disaster, and police lies tried to cover it up.
The Birmingham Six were released after spending 17 years in prison for crimes they did not commit – there's still work to do to stop it happening again.