A mobster who was accused of killing an NYPD detective in 1986 but set free after four trials died at age 84 Friday in New York after an illness, The Post has learned. Federico Giovanelli was charged with gunning down Detective Anthony Venditti, 34, who was tailing him as part of an investigation into organized-crime… https://nypost.com/2018/01/21/mobster-acquitted-in-murder-of-nypd-detective-dies-at-84/