An Oakland California rapper may be in trouble, for knocking out a security guard on Live - and giving him a "brain injury."

The video of the brutal knockout went viral yesterday, and MTO News learned that police are looking for the assailant.

In the video, you see a gas station employee/security guard arguing with an Oakland rapper. Then, the rapper pulls back and rocks the security guard with a devastating righthand punch.

The security guard gets knocked out on his feet, and his head crashes through the window.

According to online reports, the guard suffered what is being described as a "brain injury."

Here is the video:

Cali_Rapper_Coma2

The security guard was rushed to the hospital, with what is being described as a "brain injury." His condition is being described as "non-critical", but it's not yet clear whether he has permanent brain damage.