Right. The known facts would have to change to support the conviction of manslaughter. I'll give an example below that could support the conviction of manslaughter.
GZ was playing with his PF9 by twirling it in his fingers, but inadvertently and carelessly dropped it on the concrete sidewalk causing the hand gun to negligently fire a chambered round that struck Saint Trayvon in the chest mortally wounding him.
We all know nothing similar like this happened here. We hope the jury understands too.