If you're wondering about the Oakland BART riots...

... the video above provides the backstory. It shows an Oakland police officer shooting an apparently unarmed young man in the head. The video was shown on an Oakland television news program and has since gone viral on the 'net.

Here's the Reddit discussion thread, which while admittedly carrying a liberal bias, now has accumulated over 1000 comments that cover most of the talking points and arguments surrounding this incident.

Here's BoingBoing's report and discussion from yesterday.

Here's a report from the San Francisco Chronicle about the rioting in the streets of Oakland.

And here's the Reddit on the riots, decrying the looting.

Update: second video posted here.

Second update: another video shows the victim being punched by a different officer before being shot.