I heard on TruTv today from someone attending the trial, that there were witnesses that testified that Sean Bell did in fact say "Yo, get my gun". That, along with the fact of ramming the LE with a vehicle justifies the officers actions.
My son is in LE. He said you only use your weapon for "deadly force"...not to slow someone down. You must feel your life is in danger. When you use your weapon for "deadly force", you are instructed to shoot to kill...otherwise, you better not be using your weapon at all.
It is a sad case though.