Well take Lucy Letby for example. Everyone was baying for her blood after her conviction.
However now a group of eminent experts have studied the evidence and concluded that no babies were murdered at all
Given the numerous NHS hospitals in which many babies have died as the result of inadequate care this is no real surprise.
I am not saying that Lucy Letby will ever be released. The UK justice system hates admiting its mistakes. Their motto should probably be better a thousand innocent people rot in jail than one judge is made to look silly.
But at least as she hasn't been hung there's a chance.