Gangsta rap
The book "Once Upon A Time In Compton", by former Compton Gang Unit Detectives Timothy M. Brennan and Robert Ladd, along with Files, about Brennan and Ladd's years in the gang unit, the rise of Gangsta rap, gang wars, the L.A. riots, the investigations of the murders of rappers Tupac Shakur and The Notorious B.I.G., and the fall of the Compton Police Department was published on April 25, 2017.