The diagnosis transformed their understanding of the partnership. Despite earlier reports about Harris and Klebold being equal partners, the psychiatrists now believe firmly that Harris was the mastermind and driving force. The partnership did enable Harris to stray from typical psychopathic behavior in one way. He restrained himself. Usually psychopathic killers crave the stimulation of violence. That is why they are often serial killers—murdering regularly to feed their addiction. But Harris managed to stay (mostly) out of trouble for the year that he and Klebold planned the attack. Ochberg theorizes that the two killers complemented each other. Cool, calculating Harris calmed down Klebold when he got hot-tempered. At the same time, Klebold's fits of rage served as the stimulation Harris needed.
The psychiatrists can't help speculating what might have happened if Columbine had never happened. Klebold, they agree, would never have pulled off Columbine without Harris. He might have gotten caught for some petty crime, gotten help in the process, and conceivably could have gone on to live a normal life.
Their view of Harris is more reassuring, in a certain way. Harris was not a wayward boy who could have been rescued. Harris, they believe, was irretrievable. He was a brilliant killer without a conscience, searching for the most diabolical scheme imaginable. If he had lived to adulthood and developed his murderous skills for many more years, there is no telling what he could have done. His death at Columbine may have stopped him from doing something even worse.