Brown then shoved Rihanna's head against the passenger window of his rented Lamborghini, causing a one-inch raised circular contusion, according to the documents.
CLICK HERE to read the police documents.
When Rihanna turned to face him, Brown allegedly punched her and then continued punching her while driving. The alleged assault caused her mouth to fill with blood and splattered blood all over her clothing and the interior of the car.
According to the documents, which identify Brown's accuser as "Robyn F." (Rihanna's real name is Robyn Rihanna Fenty), Brown then told her, "I'm going to beat the s--- out of you when we get home. You wait and see." Rihanna countered by calling an assistant's phone and saying, "I am on my way home. Make sure the cops are there when I get there."
After that, according to the documents, an enraged Brown warned Rihanna, "You just did the stupidest thing ever. I'm going to kill you." He allegedly continued punching Rihanna, who attempted to text message another personal assistant Melissa Ford. Brown snatched the phone out of her hand and threw it out the window of his car.
When Rihanna attempted to take Brown's cell phone from his lap, he placed her in a headlock and bit her ear -- all while continuing to steer the car with his left hand, according to the documents. He eventually stopped the vehicle and Rihanna removed the key from the ignition and sat on it, hiding it from Brown, who then allegedly began punching her in the face and arms again.
Brown put her in another headlock, according to the documents, this time applying so much pressure that she was unable to breathe and began to lose consciousness. She reached up with her left hand and attempted to gouge his eyes out, trying to free herself. Brown allegedly bit two of her fingers and then released her, only to continue punching her again.
Rihanna pushed her body against the passenger door and used her feet to push Brown away. Brown punched her feet and legs until she started screaming for help, at which point he exited the car and walked away, according to the documents.
A resident in the neighborhood heard Rihanna's cries and called 911. Once the police arrived, she was issued a domestic violence emergency protective order.
At approximately 1 a.m. Feb. 8, Brown called Ford as if nothing had happened, according to the police documents. Ford told Brown she had already talked to Rihanna and was aware of what had allegedly happened, adding that the neighbors had called police and that they were with Rihanna.
Brown asked Ford whether Rihanna told the cops his name; Ford said she had. Brown then hung up the phone and did not call back.
On Feb. 17, two days after issuing a statement through his press rep saying he was seeking help from a pastor, Brown texted Ford, apologizing for what he'd done to Rihanna and affirming he was getting help, according to documents.
Early today, Brown was charged with two felonies, including assault and making criminal threats. The charges came after weeks of speculation about whether the district attorney would pursue the case. Brown remains free on $50,000 bail.
Unless a plea deal is worked out or the charges are dropped following Brown's April 6 arraignment, the next step will be a preliminary hearing (probably weeks from now) in which either Rihanna or a detective would testify.