A bombshell new book by a former Los Angeles cop alleges that Sean Combs arranged the killing of rapper Tupac Shakur and former Death Row Records CEO Suge Knight subsequently arranged for the killing of Biggie Smalls.

The book, entitled Murder Rap, says that Duane Keffe D Keith Davis was offered $1 million by Sean Puff Daddy Combs to kill Tupac Shakur and Suge Knight, according to the LA Weekly which has reviewed the book's contents.  Shakur was famously gunned down on the Las Vegas strip after a Mike Tyson boxing match in Sept. 1996. Knight suffered a bullet wound to the head, but ultimately survived.

[Combs] took me downstairs and he's like, 'Man, I want to get rid of them dudes, LA Weekly reports Keffe D saying. I was like, 'We'll wipe their ass out, quick. It's nothing.' ... We wanted a million.

In retaliation, according to author Greg Kading, Knight asked one of his baby mommas to commission the killing of Christopher Notorious B.I.G. Wallace. Wallace was fatally shot down after leaving a Los Angeles party in March 1997.

During one or more of [Swann's prison visits], Knight instructed [Swann] to help him coordinate the murder of Christopher Wallace, Kading writes. Knight directed [Swann] to contact 'Poochie' and advise him that Knight wanted Wallace murdered in exchange for an unspecified amount of money.

The murders of Shakur and Wallace have never been solved and their lack of resolution has long infuriated rap fans. Both were shot in public, but yet neither the Los Angeles nor Las Vegas police departments have ever put together a substantial list of possible suspects.

Kading, according to the LA Weekly, believes that is because the city wanted to avoid a potential lawsuit from Wallace's mother, Voletta, who alleged that dirty cops might have allowed her son to be killed.

There was a real possibility that the suit would end up being among the most expensive the department had ever had to pay out, Kading writes in the book So it came as no surprise that the brass wasted no time in putting together a task force to finally solve the 9-year-old case, find the killer, and hopefully exonerate the police in the process.

Kading was eventually pulled off the case and weeks after his removal he submitted his badge and resigned from the force.

The book is set to hit the market on Oct. 4 and is sure to drum up controversy on the subject. Sean Combs told LA Weekly the book was pure fiction and completely ridiculous, while Knight is yet to weigh in on it.