Ok, I guess I have been out of the loop, who the heck is Oscar Grant?
Just a drunk guy who thought it would be fun to fight with the BART cops and ran into one who didn't know how to handle his weapon.
In the hierarchy of law enforcement officers, you have your university piglets, your mall cops, your BART cops, your BATFE agents, your armed private security guards and finally, your real law enforcement officers. The guy who ended the life of the intoxicated Mr. Grant was a BART cop. Somewhat tragic but more of an example of incompetence than racism.