(AP) - Rodney King, the black motorist whose 1991 videotaped beating by Los Angeles police officers was the touchstone for one of the most destructive race riots in the nation's history, died Sunday. He was 47. King's fiancé called 911 at 5:25 a.m. to report that she found him at the bottom of the swimming pool at their home in Rialto, Calif., police Lt. Dean Hardin said. Officers arrived to find King in the water and unresponsive, with no signs of foul play. He was transported to Arrowhead Regional Hospital, where he was pronounced dead at 6:11 a.m, Hardin said. The San Bernardino County coroner will perform an autopsy within 48 hours. The 1992 riots, which were set off by the acquittals of the officers who beat King, lasted three days and left 55 people dead, more than 2,000 injured and swaths of Los Angeles on fire. At the height of the violence, King pleaded on television: "Can we all get along?" King was stopped for speeding on a darkened street on March 3, 1991. Four Los Angeles police officers hit him more than 50 times with their batons, kicked him and shot him with stun guns. A man who had quietly stepped outside his home to observe the commotion videotaped most of it and turned a copy over to a TV station. It was played over and over for the following year, inflaming racial tensions across the country.