I was curious to see the Soviet reaction to JFK's assassination. It seems that the Soviet and Cuban newspapers said that it was an extreme right-wing coup, perpetrated by conservative elements of the Democratic and Republicans parties, the US bourgeoisie and white supremacists.
I just like the idea of some government bureaucrat tasked with the investigation. Who knows the existential implications of Soviet involvement. And just every road they go down in the investigation, Soviets, Soviets, Soviets.
(Get in front of the Warren Commission.) 'Lone gunman.'
While travelling to Earth, the USS Defiant somehow travelled back in time to 1963. They accidentaly set in motion certain events that would prevent the Federation from forming if JFK survived. So they found someone who could pull off the shot.