A police state is one in which the government exercises rigid and repressive controls over the social, economic, and political life of the population. A police state typically exhibits elements of totalitarianism and social control, and there is usually little or no distinction between the law and the exercise of political power by the executive. (Wikipedia)

In their politically-conscious style of hip-hop, Dead Prez repeatedly call attention to the way in which Black America exists in a police state within mainstream US society. From the School to Prison-Pipeline, to the War on Drugs, to Prison Industrial Complex, to the stripping of certain rights or welfares for the formerly incarcerated, the lives of Black Americans are restricted and exploited through US government policies. In this song, they call for a violent but justified revolution against this systematic oppression.

https://genius.com/Dead-prez-police-state-lyrics