Russell Poole, the detective who handled the murder case for the late Notorious B.I.G. for a year, has died, according to the Los Angeles Times.

The publication reports that Poole was working on another cold case, and was meeting with detectives when he collapsed following a suspected heart attack. He later died at a local hospital.

“Los Angeles County sheriff’s deputies at the Homicide Bureau reported that Russell Poole collapsed Wednesday morning, according to a sheriff’s department official. He was meeting with detectives about a cold case when he collapsed and was unresponsive. He was rushed to a local hospital, where he died, the coroner’s office said,” the Los Angeles Times reports.

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Poole has provided theories on the deaths of both Tupac Shakur and Biggie.

The former LAPD detective was also responsible for penning “LAbyrinth: A Detective Investigates the Murders of Tupac Shakur and Notorious B.I.G., the Implication of Death Row Records’ Suge Knight, and the Origins of the Los Angeles Police Scandal,” a book which was released in 2003.

“The Russell Poole Theory,” Poole’s theory which suggested that the former head of Death Row security and Suge Knight’s ex-wife put a hit on Shakur and Knight, was recently featured in Vice’s “A Former LAPD Detective Thinks He Knows Who Killed Tupac” feature story.

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According to the Los Angeles Times, Poole suspected that Biggie’s death was retaliation for Shakur’s death.

For additional The Notorious B.I.G. coverage, watch the following DX Daily:

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