List of DC Comics characters: W

John Monroe was a lonely student at Stanford University in the late 1960s. His contemporaries rarely noticed him. If they did, they referred to him in derogatory terms, using words like "Weasel" to describe him. This made him bitter, driving him to become a murderer decades later. The grown John Monroe became a teacher at Vandemeer University in Pittsburgh, Pennsylvania. A number of his fellow students from Stanford University held prominent positions. To rationalize killing three of them, he considered them threats to getting tenure at Vandemeer. Taking on the costumed identity of Weasel, displaying great agility, expertise at hand-to-hand combat, and a costume with sharp claws, he stalked the campus grounds and brutally murdered Arnold Lintel, Linda Walters, and a night guard named Chuck Gherkin. When Martin Stein (one half of Firestorm) shows up for a job opening as a physics professor, Monroe made two attempts on Stein's life. After a fight, Firestorm unmasks Weasel and sends him to jail.

Weasel is later recruited into the Suicide Squad for their ill-fated mission to rescue Hawk. During the mission, he tries to kill the Thinker by cutting his throat with his claws. Rick Flag Jr. takes the Thinker's helmet and uses it to kill Weasel.

Weasel is temporarily resurrected as a Black Lantern in ''Blackest Night'' and permanently resurrected in ''The New 52'' reboot, where he is depicted as an anthropomorphic weasel. Provided by Wikipedia