Lucrecia (who loved Hojo)
I don't rememebr that at all. It might be there and I just don't remember. Where did that come from.

Hojo, in all likelihood, did kill Vincent with the shot. Said Jenova experimentation certainly happened after this, and it probably played a role in Vincent's resuscitation.
The game ctually doesn't mention if he was killed or not. To me it makes more since that he was severly wounded and then was injected with the Jenova cells. They kept him alive and also slowed his aging severly or possibly stopped it. I just to far ahead of myself with posting that last thing. It was meant to be He injected him and knowing it wouldn't kill him...