Here's 1970s New York City footage of cops on patrol, a fight between two black guys as well as the cops, and a kid speaking to his counselor. 

Begins with a train car visible through dark alleyway at night time. 

Interior of police car moving through neighborhood. Squad car passes ambulance. Flashing police lights. 

African American man beaten and bloodied stumble on the street. A man striking at police officers is put in a choke hold by an officer with a nightstick. Man with blood pouring down the side of his face speaks loudly to police. 

Dilapidated street crowded with cars and snow. A Manhattan youth counselor speaks with a young man about a warrant.