As an adult, Monroe became a teacher at Vandemeer University in Pittsburgh, Pennsylvania where a number of his fellow childhood students now held prominent positions. Monroe was rarely noticed by his contemporaries, but convinced himself that they were constantly plotting behind his back to prevent his acquisition of tenure. He developed a light but flexible and rugged fur costume suit, equipped with claws on four fingers of each hand and began stalking his peers using the identity of Weasel. He murdered three of his associates before turning his sights on his newest supposed rival, Martin Stein.