A State Supreme Court Judge has agreed to release some, but not all of the records related to the 1971 Attica Prison Riot.
The state Attorney General's Office fought to have the papers released.
In his decision, Judge Patrick NeMoyer agreed to release all portions of the records except those related to grand jury testimony.
A final investigation into the five-day uprising at the Wyoming County prison was done in 1977 but never made public.
AG Eric Schneiderman argued for the release of the documents, saying more transparency was needed.
Eleven prison staff and 32 inmates died.
The troopers' Police Benevolent Association had opposed the release of the documents.
Schneiderman's office released a statement saying in part:
"Justice NeMoyer's decision to unseal the Meyer Report is a step forward in our effort to shed more light on one of the most tragic events in the history of our state. As we have consistently said, we appreciate the need to balance the public interest in understanding events surrounding Attica and ensuring we can prevent future tragedies on the one hand with the need to protect the secrecy of grand jury proceedings on the other.