Arnold Jones (Mirage)

Arnold Bernid "Casey" Jones is a friend and constant ally of the turtles.

Background
Casey Jones grew up in Brooklyn, a neighborhood in New York, which is not exactly known for its safe environment. A young Arnold Casey Jones confronts a hulking gangbanger named Hun. Hun and his Purple Dragons have burned Jones’ Auto to the ground, killed Casey’s father and currently has his mother and sister held hostage. The badly beaten Casey refuses to lie down and takes Hun’s blows. He attacks Hun with a knife, stabbing him in the neck. Enraged, Hun beats him to within an inch of his life. It seems that the beating he took from Hun as a teenager resulted in several mental and emotional disorders, explaining his often violent and erratic behavior.

Originally an avid hockey player, he injured himself so much that after a short professional career, he could not continue playing the sport. Misled by examples from superhero comics and cop shows, Casey decided to do something himself about crime in the streets. After he had equipped himself with a hockey mask and various sports clubs, he began his vigilante campaign.

Casey Jones first appeared in the Raphael solo issue "Me, Myself and I". Raphael runs into Casey beating some muggers and proceeds to stop him before the crooks are murdered. Jones and Raphael fight several times before making peace with each other and helped each other to take down a group of muggers. Later, he comes to the aid of the Turtles, Splinter and April O'Neil when they are attacked by the resurrected Shredder at April's home. The seven escape, and retreat to a farmhouse in Northampton, Massachusetts that once belonged to Casey's grandmother. Casey "officially" becomes a part of the Turtles' family around this point, and the farmhouse acts as a second home to them all for some time. At first he and April are not really close, but over time they came closer and closer.

In the Mirage series, Casey is extremely violent, even more so than Raphael, but mellows throughout the course of the series. In "Shades of Gray," he accidentally kills a teenager who tried to mug him. The incident sent him into a drunken spiral, damaging his relationship with April O'Neil, and he began to rethink his role as a vigilante. His initial homicidal tendencies are especially present in his first appearance, although he never actually murders anyone in that instance. It is later revealed in commentary on this miniseries by one of the initial creators (Kevin Eastman) that they had intended for Casey to have become a vigilante because he watched too many bad cop shows (like Peter Laird used to), as opposed to the more popular storyline of the hero doing the same thing after seeing their family killed in front of them.

During City at War, Casey leaves the farmhouse and begins to drive to Los Angeles, planning to find April, but instead meets a pregnant woman named Gabrielle, a waitress in a small diner in Colorado, with whom he falls in love and marries. Gabrielle dies during childbirth and Casey is left to take care of her daughter, whom he names Shadow. After spreading Gabrielle's ashes, Casey returns to New York with Shadow to stay with his mother. In a chance encounter, Casey is reunited with April when she comes to buy the apartment building owned by Casey's Mom. During this meeting it's revealed that Casey's real name is Arnold. Casey repairs his relationship with April and they begin dating. By volume four, he and April are married. They raise Shadow as their daughter and try to have a child of their own. April eventually leaves Casey and Shadow when she learns that she is not human and is a product of the Kirby warp pen. As April comes to terms within herself in Alaska, Casey takes to the nightclubs to drown his sorrows. He meets up with The Foot Clan leader Karai at one of these clubs and, after a few drinks, awakens at Karai's retreat with no memory of the night before, although Karai knows something of what had happened. This plotline was left unresolved as the fourth volume came to an abrupt end. Often Casey has been known to shout the term, "Goongala," as a sort of battle cry.

Weapons
Casey often is wearing a hockey mask when he goes to fight crime and his constant weapons are a hockey stick, baseball bats, and golf club.