Did things get so violent between Rihanna and Chris Brown that the pop diva was actually choked UNCONSCIOUS by the baby-faced singer?  EOnline is reporting that Rihanna is cooperating with authorities in their investigation of what took place Saturday night, and according to E!, Rihanna has told police that Brown threatened to “kill” her and in a rage, choked her until she became unconscious.  E! reports the following:

The police are getting cooperation from Rihanna, and what she has told them so far is chilling.

A source close to the investigation tells E! News exclusively that Rihanna has alleged to police that Brown choked her while threatening to kill her and, subsequently, she lost consciousness.

They began squabbling after leaving Clive Davis‘ pre-Grammy party late Saturday. Shortly after midnight, things blew up. Brown pulled his silver Lamborghini to the side of a street in L.A.’s Hancock Park neighborhood. That’s when, per the source, Rihanna grabbed the car keys and tossed them out the window, sending Brown into a rage.

He tried in vain to find the keys, then came back to the car, put his hands around her neck and, according to the insider, said, “I’m going to kill you!”

According to the source, the 20-year-old “Disturbia” singer told police that she lost consciousness, and when she awoke, Brown had fled.

According to the source, her right eye was blackened and badly swollen and she had hand prints on her arms. The responding officers were so concerned about her, they drove Rihanna to the hospital in their squad car instead of waiting for an ambulance.

Stay tuned for more details as they emerge!

FWO-ForWomenOnline.com