[rickmichaels]

Ruby silenced the "witness". Ruby wortked for the mob.

Then why didn't Ruby kill Oswald at the first opportunity, namely, when Oswald was paraded before the media at midnight? Ruby was there and did nothing.

[RISU]

If you are going to make a patsy, you have to give the patsy time to "cook" in the public view, so that "everybody knows he did it" emerges. My guess is that after a patsy emerged, it took a little time to realize that "oh oh, we better out that fellow to sleep, or he might start looking too innocent to be the guilty one."