A 28-year old Manhattan investment banker has died after an apparent suicide, police sources said. Kenneth Bellando, who worked at Levy Capital since January, was found dead on the sidewalk outside his East Side building on March 12, after allegedly jumping from the sixth-story roof, sources said. Bellando, a former investment bank analyst at JPMorgan, is the son of John Bellando, chief operating officer and chief financial officer at Condé Nast. His brother, John, a top Chief Investment Officer with JPMorgan, works on risk exposure valuations.