A FORMER LAPD detective, who worked on the Tupac murder case, has urged cops to arrest gangster Keffe D over the rapper's death - calling him a "self-confessed murderer".

Greg Kading says that Las Vegas police simply need to arrest well known gang member Keffe D Davis, 56, who has admitted to cops, on documentaries and in a shocking book, that he was an accomplice when his nephew Orlando Anderson shot Tupac.

10 Rap legend Tupac was shot dead in Las Vegas in 1996 Credit: Raymond Boyd/Michael Ochs Archives/Getty Images

Greg, 56, said: “Keffe D should be arrested. Keffe D is a self confessed murderer.

"He has confessed publicly multiple times about his role in the murder of Tupac. And I cannot think of any case in American crime history where a confessing murderer is allowed to continue and go speak blatantly about his involvement in a crime. It is unprecedented.

“I have no vendetta against him, but he has spoken publicly now about his role in Tupac’s murder. He has admitted he got the Glock hand gun for Anderson. His confession, which has been corroborated, is more than enough to arrest him and resolve the case and end it from being an unresolved investigation. Las Vegas police should arrest him.

“He wrote in his book that he had involvement and knowledge about Tupac's killing. It is there in black and white."

10 Keffe D has confessed to his part in the murder of Tupac several times Credit: Netflix

Greg said he is "bewildered" by Las Vegas cops for their handling of the Tupac murder case from 1996, which remains open.

Keffe D - sometimes spelled as Keefe D - has already confessed on tape to Greg about his role in the murder, although that confession is not admissible.

But since then Keffe has given multiple media interviews detailing his involvement in the shooting and even wrote a book called Compton Street Legend, which was exposed by The Sun this week, detailing how the shooting went down and describing it as "just another day in the office".

10 Greg Kading in Las Vegas near to where Tupac was shot in 1996 Credit: JDMC

Greg says he can't believe authorities ignoring Keffe’s blatant “showing off” over the murder now.

“It is bewildering to me that nothing has happened," he said.

"It is relatively simple. All Las Vegas Metro have to do is locate him, detain him, bring him in, interview him and book him. Then take the information over to the District Attorney’s office and attempt to get a prosecution."

He added: “It is that simple as that to clear the case. Keffe D holds the key."

Asked why Metro cops have not even questioned Keffe, he replied: “The only ones who can answer why they have not asked Keffe is them. And they have refused to answer that.”

Greg added: “By doing these interviews and this book Keffe is out there profiting from Tupac, while mocking law enforcement and mocking the gang world.

“It is very risky because Tupac has some of the most devout fans in the world and in that urban gang culture it is unpredictable what the consequences may be.

10 Tupac Shakur died on Friday September 13, 1996, after being shot in Las Vegas Credit: AP

“By talking about this, Keffe becomes a bigger target within his own circles.

"Once in that community that he used to be a demi-God now see him as a worthless snitch...

“I understand he is unwell and may not have long to live, so he wants to earn money for his family. He is not doing this with moral conviction - it is about taking advantage.”

Tupac was murdered when Orlando unleashed a hail of Glock bullets into a BMW driven by Knight on the Vegas strip on September 7 1996.

In the 23 years since that slaying Metro Police has not arrested a single person in relation to the case.

During that time aside from Keffe’s media admissions, other gang members and LAPD investigators detailed Keffe's involvement in the murder.

10 Greg during his time on the LAPD task force, which obtained the confession from Keffe Credit: JDMC

Greg says that he will never forget the several hours that he listened to Keffe breaking down the killing of Tupac in 2007.

The gang lynchpin had agreed to become an informant after facing life in prison after Kading’s team had him banged to rights for a PCP drug and cocaine trafficking.

The task force felt he would have vital insight into the key figures connected to the murder of Biggie Smalls in Miracle Mile in LA in 1997. So after striking a proffer deal, Keffe confessed everything while being secretly audio recorded.

Greg said: “Then the Southside Crips were doing security for Biggie.

“Keffe D came in for questioning under a conditions of 'proffer agreement' which allows him to tell the truth without the risk of self incrimination.

”So when we asked him specifically what he knew about the murder of Biggie he said: ‘I don’t know who killed Biggie Smalls. That one wasn't us.’

10 Tupac's death still fuels conspiracy theories to this day - with some believing he is still alive Credit: Raymond Boyd/Getty Images

“And of course at that moment I knew I instinctively where we were going. It lead to the inevitable question from me: ‘Which one was?’ That opened the door to the Tupac case

“And Keffe simply uttered: ‘I am about to blow your mother f***ing mind.’

“We knew his nephew Anderson had always been the primary suspect. But he walked us through the whole situation, starting with the hostility between Puffy and Suge.

“And then walked us right through the night of the murder with Orlando firing the shots while he sat in the car.

"At that time no-one ever knew that entire play. We knew he was telling us the truth, because he was explaining information that you could not know unless you were there. We had Vegas police files so it all made sense and proved that he gave an accurate description.”

10 Greg with his partner Daryn Dupree from the LAPD taskforce Credit: JDMC

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However as Greg and the task force pushed forward, his chief pulled the plug on him solving Tupac’s murder and he was told to pass all his information on to Las Vegas police, which he did.

He added: "The fact they appeared to do nothing in the 11 years since our investigation was frustrating."

The Sun reached out to Las Vegas Metropolitan Police but they declined to comment.

New documentary claims Tupac is 'alive and hiding out in New Mexico after escaping Vegas'

10 Rapper Tupac Shakur, left, and Death Row Records Chairman Marion "Suge" Knight Credit: AP:Associated Press

10 Tupac and Suge Knight's car riddled with bullets Credit: Getty - Contributor