An investigation begun four years ago by a law professor who tapped her students to assist in research, interviews and attempts to track down a crucial witness to a 1980 fire, culminated Wednesday in overturned arson/murder convictions for three men.

Members of the Brooklyn District Attorney’s Conviction Review Unit told Acting Brooklyn Supreme Court Justice Matthew D’Emic that, upon their own re-investigation into a fire that killed a mother and her five young children, they had no confidence in the convictions of Amaury Villalobos, William Vasquez and Raymond Mora.