<Li> February 26, 1992--Two teens were shot to death by 15 - year - old Khalil Sumpter inside Thomas Jefferson High School an hour before a scheduled visit by then mayor David Dinkins . Sumpter was paroled in 1998 at the age of 22 . </Li> <Li> March 11, 1992--Manuel de Dios Unanue, a Cuban - born journalist who edited several Spanish - language newspapers, was shot to death at a Queens bar . Several men were later convicted in the murder, apparently carried out at the order of the Colombian Cali cartel on whose activities de Dios had reported extensively, the first time the cartel had murdered one of its opponents on American soil . </Li> <Li> December 17, 1992--Patrick Daly, principal of P.S. 15 in Red Hook, Brooklyn, is killed in the crossfire of a drug - related shooting while looking for a pupil who had left his school . The school was later renamed the Patrick Daly school after the principal . </Li> <Li> February 26, 1993--A bomb planted by terrorists explodes in the World Trade Center's underground garage, killing six people and injuring over a thousand, as well as causing much damage to the basement . See: World Trade Center bombing </Li>

Number of murders per year in new york city