While looking for something unrelated this morning, I came across quite the cinematic find just posted to the Internet Archive: a full-length copy of Oscar-nominated director Emile de Antonio's 1966 film Rush to Judgment, based upon New York attorney Mark Lane's best-seller of the same name in which he more or less spells out "what he might have done as adversary for the defense if [Lee Harvey] Oswald had gone on trial," per Time's September 1966 "Autopsy on the Warren Commission."
The film has been out of print for years; copies sell for up to $200. I've only seen bits and pieces of the doc on YouTube over the years, where it's often broken down into brief segments. Filled with interviews with witnesses to the assassination of John Kennedy and former employees of Jack Ruby (including pianist Joe Johnson, who plays for Lane), as well as then-fresh footage of Police Chief Jesse Curry and District Attorney Henry Wade, Rush to Judgment is as much as a history of Dallas in the early to mid-'60s as a criticism of the Warren Commission's report.
The entire film follows for those with 90 minutes to spare.