"I know there were many good policemen who died doing their duty. Some of the cops were even friends of ours. But a cop can go both ways"

In this quote, Martin Scorsese is acknowledging the sacrifices made by policeman who have lost their lives while carrying out their tasks. He likewise discusses that some of these officers were even pals of his, highlighting the personal connection he has to the concern. Nevertheless, Scorsese likewise recommends that being a law enforcement officer is not a black and white role, and that there are circumstances where a police officer might act in a way that is not in line with their task. This statement could be interpreted as a commentary on the intricacies and difficulties of being a policeman, and the capacity for corruption or abuse of power within the profession.