Casey Jones

Casey Jones, also known as Casey, is the tetartagonist of Teenage Mutant Ninja Turtles: Out of the Shadows.

He is the good friend of the Ninja Turtles. As a heroic and hot-headed vigilante, he is a human who at night fights crime in New York City with his sport equipments. He also helps out the Ninja Turtles in their missions of trying to save New York City. Casey Jones debuts in Teenage Mutant Ninja Turtles: Out Of The Shadows.

Powers, Abilities, and Weaponry
Police Training: Having become a police officer, that implies that Casey has at least some kind of police training.

Hockey skills: Casey possesses impressive hockey skills, as he has mentioned that he is on a hockey team, and he used impressive hockey skills while single handedly fighting a group of foot ninjas.

Marksmanship: Casey possesses somewhat good marksmanship, specifically with a shotgun, as he did so when trying to shoot down Shredder from escaping.

Skating: Casey possesses impressive skating skills, as he was able to use handmade roller blades while fighting both Bebop and Rockstready. This also implies that since he is on a hockey team, that he might also know how to ice skate, depending on whether or not it's ice hockey.

Trivia

 * His hockey stick brand is Eastman, a nod to the co-creator of the Turtles Kevin Eastman.
 * The Nickelodeon's Casey Jones also has a Eastman hockey stick.
 * 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.