The Notorious B.I.G. and Tupac Shakur are by far the two most famous murder victims in rap history.

Both of their cases remain unsolved.

In an interview published on the the 20th anniversary of Biggie's death, his mom Voletta Wallace tells The Daily Mail she knows who killed her son -- but she's not naming names.

‘I have a very good idea who murdered Christopher and I genuinely believe that the LAPD know exactly who did too,’ she said. They’ve done their investigation, but they just refuse to move forward. I don’t know why they haven’t arrested who was involved. It seems to me that it’s one giant conspiracy, and someone is definitely being protected somewhere down the line.’

It's a rumor that's been around since the shooting.

Do you think that's what happened?