The Los Angeles District Attorney's office charged Chris Brown with felony assault and a felony count of making criminal threats in connection with his alleged altercation with girlfriend Rihanna on February 8, according to a statement released by the office. The charges, which came during an arraignment Thursday (March 5) in Los Angeles, could land the 19-year-old singer in jail for up to four years. Brown is officially charged with one count each of assault with force likely to produce great bodily injury and making criminal threats. "R&B singer Chris Brown was charged by the District Attorney's office today with felony counts of assault and making criminal threats in connection with a February incident in which his girlfriend allegedly was physically attacked," the statement reads, not naming Rihanna as the victim, per department policy on such domestic-violence matters — although it later refers to the victim as "Robyn F." Rihanna's given name is Robyn Fenty. The case file says the alleged crime occurred "on or between" February 7 and February 8, "when the defendant and the victim, identified only as Robyn F., were driving to a residence in the Hancock Park [Los Angeles] area." Brown and Rihanna are alleged to have gotten into a heated argument after leaving the annual Clive Davis Pre-Grammy Gala on February 7; neither artist attended the Grammys the next night, where both were scheduled to perform and both were up for awards. Earlier Thursday, Fox 11 News in Los Angeles and TMZ.com released what were claimed to be details of the search warrant in the case. The warrant reportedly says that Rihanna and Brown were driving in his rented Lamborghini when Rihanna read him a three-page text message from an unidentified woman. An argument reportedly ensued. The report alleges that Brown tried to force Rihanna out of the car, shoved Rihanna's head against the passenger window, struck her several times, bit her and and put her in a headlock, nearly causing her to lose consciousness. Brown is scheduled to appear at an arraignment after 3:30 p.m. Thursday in Los Angeles Superior Court; he remains free on $50,000 bail following his arrest on suspicion of making criminal threats. Brown's attorneys were reportedly working on a plea agreement in the days leading up to the charges. The couple reportedly reconciled last weekend at a home owned by Diddy in Miami, but Rihanna is reported to have cooperated with police in the initial investigation into the incident, which reportedly left her with serious contusions on her head, bruising on her face and bite marks on her hand and arm. Click here for the court documents Click here for Search Warrants documents SOURCE: www.mtv.com