He joined the Alpha Epsilon Pi fraternity, and twice won the George William Curtis Prize for excellence in the public English orations as an undergraduate.
[3] In 1956, he was the lawyer for John Henry Faulk and won a libel case against the anti-communist group AWARE, Inc. for 3.5 million dollars, reduced to 750,000 upon appeal.
[5] He wrote several books, among them the best-selling My Life In Court in 1961, about many of his famous cases, which spent many weeks on the New York Times bestseller list.
From 1928 to 1994, Nizer served as executive secretary and attorney for the New York Film Board of Trade, a position previously held by Louis Phillips.
After the assassination of John F. Kennedy, he wrote the foreword to the Doubleday & Co. publication of the Warren Commission report on the investigation of JFK's murder, which had been researched by a former Department of Justice prosecutor who had recently joined the firm, future boxing promoter Bob Arum.
[7] Nizer was portrayed by George C. Scott in the 1975 CBS made-for-television film, Fear on Trial, co-starring William Devane as the blacklisted radio personality John Henry Faulk.
Both on stage and on television, Van Heflin portrayed Robert Sloane, a fictionalized version of Nizer, in the play A Case of Libel, which dramatized the Quentin Reynolds - Westbrook Pegler trial.