LOS ANGELES (CBSLA.com)   —  The LA police detective who handled the murder case of rapper Biggie Smalls died from a suspected heart attack, officials said Thursday.

Russell Poole was 62.

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The retired Poole collapsed Wednesday morning while meeting with detectives about a cold case, sheriff’s officials told the Los Angeles Times.

He died at a hospital, according to the coroner’s office.

Poole worked on the Smalls murder case for about a year, according to the paper.

The 24-year-old New York rapper, born Christopher Wallace and also known as Notorious B.I.G., was shot to death in Mid-Wilshire on March 9, 1997.

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The rapper’s death spawned many conspiracy theories, among them that it was somehow connected to the Las Vegas slaying of rapper Tupac Shakur six months earlier because they and their respective record companies were seen at odds.

Poole advanced the theory that Wallace’s death emerged from a plot involving a corrupt LAPD detective and Marion “Suge” Knight, who headed Shakur’s company when Shakur was killed. Wallace’s killing was retaliation,
Poole suggested, according to The Times.

Knight, who is in jail awaiting trial for allegedly running down two men in Compton with a pickup, killing one of them, was never formally implicated in Wallace’s killing.

According to the LA Times, Poole quit the force in 1999 after a series of disputes over the direction of multiple investigations, including Wallace’s murder.

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The Wallace and Shakur killings both officially remain unresolved.