Joseph Baldi (January 16, 1941 – October 17, 2009), known as The Queens Creeper, was an American serial killer who, from 1970 to 1972, stabbed four women and girls to death in the Jamaica neighborhood of Queens, New York City. His case, along with those of Charles Yukl and Ricardo Caputo, garnered notoriety due to the fact that Baldi had been erroneously released after he was deemed mentally ill, allowing him to claim more victims. For these crimes, he was found guilty and sentenced to a 25-year-to-life sentence at Sing Sing, which he served until his death in 2009.