1996-97 is the sophomore year of both Eric Harris and Dylan Klebold. Starting sometime in 1997, Eric's anger issues started to become visible to students of Columbine.
March-September 1996 - The Harrises purchased a $180 thousand dollar house on Pierce Street, just south of Columbine High and only minutes away from where Brooks Brown lived. Eric was very active on the internet, posting as many as 11 homemade Doom wads of his own design. At some point he was active in a Quake team that called themselves the RC Rebels.
April 1997 - Eric Harris is employed at Blackjack Pizza.