Greg Kading is a former LAPD detective covered and "solved" the murders of the Notorious B.I.G. and Tupac Shakur in his 2011 book, Murder Rap: The Untold Story of the Biggie Smalls & Tupac Shakur Murder Investigations. During this exclusive clip, Greg explains the circumstances behind the shooting of 2Pac and who was involved. Kading believes Suge Knight knew who shot Pac, causing a war to start the next day throughout Los Angeles' inner city. Watch above.