According to this article, my own home state of Ohio has put together a short film about six unsolved missing children cases and will show it in thirty-two state prisons, to hopefully get some tips out of the inmates. The article doesn’t say whether these will be only Ohio missing kids in the film, but I assume so.
Either way, I think this is an excellent idea! It’s sort of like the unsolved cases on prison playing cards, and I understand those have yielded valuable information. I hope other states adopt this idea as well.