United Kingdom, July 1 -- Marion 'Suge' Knight claims a group of Tupac Shakur's closest friends and family smoked his cremated ashes in a blunt.

Speaking exclusively to PEOPLE from California's Richard J. Donovan Correctional Facility, where he is serving a 28-year sentence for a 2015 fatal hit-and-run, the former Death Row Records CEO recounted the events surrounding Tupac's death and the unusual tribute that followed.

Tupac Amaru Shakur, aged 25, was fatally shot on 7 September 1996 in Las Vegas after attending a Mike Tyson fight with Knight.

The pair were ambushed at a red light after leaving the MGM Grand, when gunfire tore through their black BMW.

Knight was grazed in the head, but Tupac was shot four times.

He told People: "I g...