In the Arrow episode "A Matter of Trust", the character of Evelyn Sharp asks of the character Wild Dog: "what kind of vigilante wears a hockey mask?", to which Oliver Queen (Amell) interjects that he thinks it's cool.
Casey works as a prison guard. This is a homage to the Turtles' ally Nobody, a police officer turned vigilante.
In the film, he drives a black 2016 dodge hellcat challenger.