And two minutes before Lincoln was shot, John Wilkes Booth was seen in front of Gerald Ford’s Theater getting into an Uber.
On a related note ... I never knew Abraham Lincoln was Jewish until I learned in school that he was shot in the temple. :-P

It was the Continuum of Intergalactic Aliens.
Their Ray Guns include a Sound Effect like a gunshot.
One of their rays came down from The Mothership but instantly turned at a sharp angle and bounced off a mirror in the building adjacent to where Oswald was actually seen standing and holding his rifle.
But nobody has ever been able to figure out the end of the story . . . ?