In the courtroom scene of Jackie the hooker's preliminary hearing, the Judge's name on his desk nameplate is "Hon. Fred R. Simpson" . This is also the name of the film's First Assistant Director.
Robert Blake's thing is to always have an unlit cigarette in his mouth, which would carry over (to the following year) in his cop television series Baretta.
Sid Haig had mentioned in an interview that this film was basically being rewritten as it was filmed.
Robert Blake, who was himself a cast member of Our Gang aka The Little Rascals, refers to Allen Garfield's overweight Rizzo as "Spanky".