John Arthur Palladino (July 9, 1944 – February 1, 2021) was an American private investigator and attorney. In 1977 he founded the private detective agency Palladino & Sutherland with his wife, Sandra Sutherland, and over a career spanning more than four decades, Palladino specialized in the preparation for trial of witnesses and evidence in litigation. He was best known for his work in the Peoples Temple tragedy, his defense of car maker John DeLorean, for the Bill Clinton presidential election committee, the tobacco industry whistleblower Jeffrey Wigand, singer Courtney Love, and musician R. Kelly.