King's fiancee, Cynthia Kelley, repeatedly implored authorities to hurry to his Rialto home. In the call early Sunday, Kelley tells a dispatcher that she tried to rouse King but he wasn't responding.
"He's not moving," Kelley says at one point. "I was sleeping, all of a sudden I heard something fall like the table and then I looked over and then I went to find him and he's at the bottom of the swimming pool. He's still there. Please hurry up."
The 5 minute, 15 second phone call ends with the arrival of police officers who pulled King from the pool and began life-saving efforts. He was taken to a nearby hospital where he was pronounced dead.
At one point, Kelley told dispatchers that the man in the pool was King, "the guy that got beat by the police."
Police have said they have found no signs of foul play and continue to investigate King's case as an accidental drowning.
Authorities are awaiting toxicology results and said they'll use them in conjunction with an autopsy performed Monday to determine how King died.
King became famous after his severe beating by Los Angeles police in 1991 was captured on videotape and broadcast worldwide.
The trial of four officers charged with felony assault in the beating ended after a jury with no black members acquitted three of the officers on state charges; a mistrial was declared for a fourth.
The verdict sparked one of the most costly and deadly race riots in the nation's history.