Roger Guenveur Smith, who plays Pruitt, also played Huey Newton in A Huey P. Newton Story (2001), meaning he has played characters at the birth and death of the Black Panther Party for Self-Defense.
At a party, a Black Panther member is shown playing a cream colored guitar with a Floyd Rose tremolo and locking nut. Floyd Rose didn't invent the locking tremolo system until 1977. The film is set in the mid-'60s.
When Detective Brimmer is chasing Judge, he makes a radio call saying the he is running east on Market Street, in Oakland, CA. Market Street in Oakland, runs South to North. There is no way to run East on Market Street.