Robert M. Morgenthau, who crusaded against both petty crooks and corporate greed, died on Sunday, a report said. He was 99 years old. Morgenthau, the city’s longest serving district attorney, died at Lenox Hill Hospital after a short illness, his wife told The New York Times He was Manhattan’s district attorney from 1975 to 2009, and was the longest serving incumbent of that position. In his nine terms in office, his staff conducted about 3.5 million criminal prosecutions. Morgenthau is most widely remembered for his high-profile, greatest-hits prosecutions, many involving A-listers. He has gone after more allegedly rappers Jay-Z, Foxy Brown, Lil Wayne, Ja Rule and Ol’ Dirty Bastard. He also put away John Lennon killer Mark David Chapman, subway vigilante Bernie Goetz, and Preppy Killer Robert Chambers — twice. He oversaw the prosecution of Dennis Kozlowski, who was convicted in 2005 of looting nearly $100 million from Tyco. Morgenthau was the inspiration for the creation of District Attorney Adam Schiff, a “Law & Order” character loosely based on him. In his later years, Morgenthau became a philanthropist and also kept tabs on Fishkill Farms, his family’s 270-acre upstate fruit and vegetable outfit.