Thanks for posting, I've never noticed the glasses in Jack Ruby's jacket pocket before

Probably the same ones he was wearing when he corrected the TV host about which org 'fair play for Cuba Committee' Oswald was a part of when he(Ruby) was in the audience of a TV show broadcast several days before this happened

Jack Ruby, at the late evening press conference on the day of the assassination, corrected District Attorned Henry Wade about the name of the group in which Oswald claimed membership. Wade told reporters that Oswald was a member of the “Free Cuba Movement,” and Ruby corrected him to say “Fair Play for Cuba Committee.”

Just how is this supposed to suggest a conspiracy? Author Jim Marrs suggests:

While Ruby later claimed to have heard of Oswald’s Fair Play for Cuba Committee affiliation over a local radio station that afternoon, it nevertheless struck researchers as most odd that this nightclub owner with no known politics would note the difference between the anti-Castro Free Cuba Committee and the pro-Castro Fair Play for Cuba Committee. Of course, this knowledge would not seem at all odd if the accounts of a Ruby-Oswald relationship are true. (Marrs, Jim. Crossfire [p. 399]. Basic Books. Kindle Edition).

Jim Garrison provides a somewhat different explanation in his Playboy interview: You may remember that on the night of the assassination, Dallas D.A. Henry Wade called a press conference and at one point referred to Oswald as a member of the “Free Cuba Committee” instead of the Fair Play for Cuba Committee. Jack Ruby, who just happened to be there, promptly chimed in to correct him. Ruby was obviously in the jail that night on a dry run prior to his successful murder of Oswald on Sunday — a possibility the Warren Commission never bothered to consider — and could hardly have been eager to draw attention to himself. However, he must have been afraid that if the press reported Oswald was a member of the “Free Cuba Committee,” somebody might begin an investigation of that group and discover its anti–Castro and ultra–right–wing orientation. And so he risked his cover to set the record straight and protect his fellow conspirators.

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Video(The colour shot is from the Oliver Stone JFK film, but all the black and white stuff is real archival footage)