Not really, when you look at how that went down. There were dozens and dozens of people there with no real organized control. It was just a media circus. Imagine large groups of people upstairs watching for the move to the armored van or vehicle, then running en-masse down stairwells then pushing and shoving, to get the best vantage point while the people already there jostled for the position they had. There were people shoving and pushing each other, standing on desks both upstairs and downstairs. People are yelling across the room, waving to get the attention of someone else, trying to pass information on phones to their paper, and so on.
Someone tries to restrict the area to authorized press passes, but nobody listens to him. He guides this person and that person with no pass away from the gaggle, and ten more surge into space. They have people camped in offices, using police telephones, etc.
The police who are supposed to be outside keeping people from walking in on the ramp past the truck aren't even paying attention to that, they are rubbernecking to the craziness inside.
Ruby, who knew the area well, just walked on the other side of the truck like a good gate-crasher would, looking like he knew where he was supposed to go. Which he did. All the policemen and detectives knew who he was because he had been there a lot, even handing out passes to the police department personnel for his all-girl review show. And they would thank him by name, and some would even go to the shows where they were sometimes given free drinks.
Not that outlandish to me. It was a crazy zoo with zero to little security and control.
The fact that Ruby could get to Oswald is not the whole issue. It’s the reason he claimed he shot Oswald, to spare Mrs. Kennedy of the ordeal of a trial. Come on......if you examine Ruby and his life, does that sound plausible? If so, I have a bridge that connects Alaska and Russia for sale, cheap.