https://en.wikipedia.org/wiki/West_Memphis_Three
Here's why prosecutors seek it:
As part of the plea deal, the three men cannot pursue civil action against the state for wrongful imprisonment.
And if you think about it.. if they really thought this person was a murderer, letting them out would not be on the table.
Personally, I believe that if a prosecutor wrongly pursues a case, hides evidence, whatever and gets a conviction. When the sentence is overturned, it should be applied to the prosecution. It might teach some respect for the power they're throwing around.
* Yes, I know that won't work. :(
In Florida, they actually charge the defendant the cost of prosecuting him. What the hell?!
https://www.lawserver.com/law/state/florida/statutes/florida...