In 1995, Shakur served eight months in prison on sexual assault charges, but was released after agreeing to sign with Marion "Suge" Knight's label Death Row Records in exchange for Knight posting his bail. Following his release, Shakur became heavily involved in the growing East Coast–West Coast hip hop rivalry. His double-disc album "All Eyez on Me" (1996), abandoning introspective lyrics for volatile gangsta rap, was certified Diamond by the RIAA. On September 7, 1996, Shakur was shot four times by an unknown assailant in a drive-by shooting in Las Vegas, Nevada; he died six days later and the gunman was never captured. Shakur's friend-turned-rival, the Notorious B.I.G., was at first considered a suspect due to the pair's public feud, but was also murdered in another drive-by shooting six months later in Los Angeles, California. Five more albums have been released since Shakur's death, all of which have been certified Platinum in the United States.