LOS ANGELES, Calif. (KTLA) -- A new book written by a former Los Angeles police detective claims that hip-hop mogul Sean "Diddy" Combs was the man behind the 1996 slaying of rapper Tupac Shakur.

In his book -- titled "Murder Rap" -- former LAPD detective Greg Kading said a gang informant claimed Combs offered him $1 million to kill Shakur and Death Row Records chief Suge Knight.

Kading also claims that Knight paid a gang member to kill rapper Notorious B.I.G. in retaliation for the murder of Tupac Shakur.

The former detective also claims that the LAPD is sitting on evidence that could solve the case once and for all.