A lawyer-turned-investigative journalist who wrote a book on the assassination of President Kennedy has hired another lawyer-author with opposite views on the subject to represent him in a possible lawsuit against the Miami New Times.

Gerald Posner, a former associate at Cravath, Swaine & Moore, wrote the book Case Closed. It supported conclusions of the Warren Commission that Lee Harvey Oswald was the gunman who killed Kennedy. Posner’s new lawyer is Mark Lane, author of Rush to Judgment, a book criticizing the commission’s finding that Oswald was the lone assassin, according to a press release and the Miami New Times.

Posner wants to sue the Miami New Times over stories claiming plagiarism. His new lawyer, Lane, alleges in a letter to the New Times that the claims are exaggerated and there is an apparent campaign to destroy Posner’s ability to work.

The Miami New Times quotes editor Chuck Strouse, who says, “We clearly have nothing against Mr. Posner, though we despise his admitted serial plagiarism.”