The 1997 murder of rapper Christopher Wallace - better known as The Notorious B.I.G. or simply Biggie Smalls - has remained unsolved ever since. However, a remarkable new documentary names five cops who were 'implicated' in the case - watch the trailer below:
The musician was shot and killed in an organised hit in Los Angeles in 1997, with theories differing as to who was responsible - was it a run of the mill gangland shooting or were the authorities involved?
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Almost 25 years have passed since Biggie's death, and Nick Broomfield's new film Last Man Standing offers up the names of the LAPD officers believed to have had a hand in it.
During one scene, an ex-cellmate of corrupt LAPD officer Rafael Perez, Kenneth Boagni, says Perez was involved and that he was threated with death if he ever spoke out about it.
During their conversation, he names Perez and his partner David Mack as having been 'implicated' in the shooting, along with three other officers.
Suge Knight, the disgraced boss of Death Row Records, is believed to have organised the shooting as a retaliation for Tupac's death a year earlier, which he is also alleged to have set up.
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According to those close to both Tupac and Biggie, Knight used his contacts in the police, many of whom worked for him, to orchestrated the hit.
But if the police were heavily involved in Biggie's murder, who actually killed him.
Speaking to LADbible, the film's director said he is confident of who actually pulled the trigger that night in March.
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He says: "I think this guy Harry Billups pulled the trigger. He was very, very close friends to David Mack.
"And I think Rafael Perez and David Mack basically coordinated the hit, along with a few other people.
"I mean, I think they were all together, you know, at least five or six police officers involved with other people probably.
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"It was a very complicated hit, really, it was in a very crowded area. There were a lot of police present.
"But it was very, very well coordinated and very professionally conducted. I mean, it was it was anything but a gang banging yet."
But in the two decades that have passed since his murder, no one has been brought to justice, with the LAPD covering up evidence that allegedly shows police involvement.
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Broomfield says that if Tupac and Biggie had been white, this may have been a very different story.
"I do think that had it been, you know, college kids being shot in a sort of white area, there would have been much more of an outcry than what actually happened," he tells us.
"I think as soon as there was the rumour that gangs were involved, and this was a gang killing, and this was because of a war between the East Coast and the West Coast and all the rest of it, you know, people in LA just didn't want to be involved.
"I mean, they've been killing in Compton and Watts over the drugs, the distribution of crack and so on for years.
"And I think what happened in those areas was kind of regarded as being in a different city by people in LA. It wasn't taken as something that really involved them - it wasn't like it was in Beverly Hills, or Santa Monica or something, or was in a white area."
Last Man Standing is in cinemas for one night only on 30 June, followed by a special Q&A with Nick Broomfield, hosted by Trevor Nelson. To book tickets, head to lastmanstanding.film.
On general release in select cinemas from 2 July.
Topics: Police, Entertainment, Music, crime, UK Entertainment, US Entertainment, Murder