As the Brooklyn district attorney’s office pledged a complete review of about 50 murder cases after questions arose regarding the conduct of the detective assigned to them, renewed scrutiny has also focused on the role prosecutors play in what turn out to be wrongful convictions, and whether they should be held responsible when justice goes awry.

Prosecutors working for the Brooklyn district attorney, Charles J. Hynes, recently found that flawed police work by the detective, Louis Scarcella, and a partner led to the conviction of a man in the 1990 killing of a Brooklyn rabbi. A judge recently ordered the release of the man, David Ranta, after he spent 23 years in prison for the rabbi’s murder.

On Sunday, Jeffrey Deskovic, who served 16 years behind bars for the rape and murder of a woman in Westchester County that he did not commit, vowed that a foundation he established would conduct its own review of Mr. Scarcella’s work, to find out if anyone else had been wrongfully convicted.

“Considering that Scarcella was working in tandem with the prosecutors, relying on the D.A. to do the investigation is like asking the fox to guard the henhouse, particularly when exposing the cases would mean exposing prosecutorial complicity,” Mr. Deskovic said.