i think that there was a conspiracy. Maybe not a "high-level government" conspiracy, but I don't think Oswald "acted alone." Oswald's assassination at the hands of Jack Ruby just makes such little sense. I don't think any of them planned on anyone involved getting caught, but there were other shooters acting as fail safes if Oswald didn't hit his target. Ruby, on the other hand, was tied to organized crime and others that lost a lot in Cuba. To many, it was a very personal thing, and the murder may not have occurred for any other reason besides revenge, think Max Cady-type revenge, for the Bay of Pigs. If Ruby was actually tasked with killing Oswald, why was nobody sent to kill Ruby? Basically his killing of Oswald doesn't make a lot of sense because it was an irrational act based almost completely on chance. Oswald was actually transferred later than announced; Ruby was still asleep when Oswald was originally scheduled to be moved. He finally heads downtown and literally minutes before he shoots Oswald he's posting a money transfer at a Western Union office. He actually let the guy behind in him line go first; if that customer had taken just 30 seconds longer to finish his business Ruby would have missed Oswald's transfer completely. He brought his favorite dog along and left her in the car; everyone who knew him said he adored that dog and would have never left her in a car if he knew he wasn't coming back. Most damning of all is that Oswald was further delayed when he asked for a sweater. Without this act, Ruby yet again misses Oswald. The only way that was staged was if Oswald himself was in on his own execution. Nevermind that Ruby was in and out of police HQ throughout the weekend. He had multiple chances to kill Oswald during those times, yet if he's assigned to silence Oswald he waits to do it at a moment that requires a multitude of lucky breaks to succeed (the armored car couldn't fit down the driveway, the chief's car couldn't back right up to the door because of all the reporters, etc.). This is a very temperamental, emotional guy and he finally snapped (and his mob connections are vastly overstated; he was a hanger-on in Chicago and Dallas at best. It was basically inevitable that he would know made guys based on who he grew up with and because he ran strip clubs but he was never anyone really all that connected and basically would be the worst choice for mob hitman ever). If there were other shooters they literally left no trace of their existence. Dealy Plaza as a whole was scoured after the assassination and nothing was found besides evidence pointing to Oswald as the shooter. That's where any idea of a "small" conspiracy falls apart because a massive one is required to not only completely remove any evidence of anyone else but to also manipulate everything so that it points only at Oswald. It's just not realistic that something with so many moving parts and so many people required would have worked so perfectly. Hell, if anyone would be backing Oswald as the lone shooter I'd think it was you, sulley, since he killed him for Cuba and Castro. He's a true revolutionary!