Yes, here is the man that these powerful conspirators were so afraid would expose their conspiracy that they had him killed.
Dozens of reporters, live cameras. This is how they "silenced" him. But this was done to give Ruby a chance to shoot him. So why didn't Ruby do it? Never mind.
They gave Oswald numerous opportunities to expose their conspiracy; but he never did. He talked to his family, to the head of the Dallas Bar, to numerous reporters. But not a word from him about this conspiracy.
To normal people that's evidence that there wasn't one. To conspiracy thinkers it's evidence that there was.