Dylan Bennet Klebold – Columbine High School Shooter
Introduction
On April 20, 1999, 17‑year‑old Dylan Bennet Klebold walked into Columbine High School in Littleton, Colorado, alongside his friend Eric Harris and helped carry out the massacre that would define a generation’s image of school shootings. They killed 13 people and wounded more than 20 others before dying by suicide in the school library. In the public imagination, Klebold was often flattened into a simple “trench‑coat kid,” but his journals, tapes, and background tell a more complicated story: a chronically depressed, self‑loathing teenager who fused his wish to die with Harris’s hunger to kill, creating a deadly partnership.
Early Life and Family Background
Dylan Klebold was born on September 11, 1981, in Lakewood, Colorado, the younger of two sons of Tom and Sue Klebold. His parents were college‑educated, politically liberal, and deeply involved in their children’s lives; the family was solidly middle‑class, living in a comfortable home and encouraging academics, creativity, and open discussion. As a child, Dylan was described as bright, gentle, and shy. He participated in activities like camps and scouting, did well in elementary school, and showed an aptitude for math and computers.
There were, however, early hints of social difficulty. Dylan tended to be introverted, awkward in large groups, and anxious about fitting in. He had a small circle of friends rather than a broad network and sometimes struggled with transitions or conflicts. Unlike many later school shooters, he did not grow up in an obviously abusive or chaotic home; in fact, the contrast between his relatively nurturing environment and his eventual actions has been a central point of fascination for psychologists and the public alike.
Social Withdrawal and Internal World
Adolescence was not kind to Klebold. As he moved into middle and high school, his social anxiety, feelings of inadequacy, and sense of not belonging intensified. At Columbine, he was academically capable but increasingly disengaged – turning in some strong work in subjects he liked, but more often skipping assignments, zoning out, or coasting. He drifted toward a small group of outsiders, including Harris, who shared dark humor, video games, and cynical commentary about school life.
Privately, his emotional landscape was crumbling. His journals – later released in part and discussed extensively in Dave Cullen’s “Columbine” and in clinical profiles – are saturated with depression, self‑loathing, and longing for connection. He wrote about unrequited crushes on girls he felt too awkward to approach, describing himself as “ugly,” “stupid,” and destined to be alone. He fantasized about being with a “soulmate” and expressed a deep sense of alienation, as if he were watching life through glass.
The same entries are riddled with suicidal ideation. He wrote that he wanted to die, that he hated himself, and that he sometimes planned his own death in detail, long before the Columbine attack coalesced. He also used substances – alcohol and marijuana – with friends, in part to blunt the intensity of his feelings and to fit in socially. Unlike Harris’s journals, which radiate contempt and control, Klebold’s are more anguished and conflicted – oscillating between rage at others and hatred of himself.
Relationship with Eric Harris
Klebold met Eric Harris in middle school, and their friendship deepened in high school as they gravitated toward each other and a small group of peers on the fringes of Columbine’s social scene. On the surface, they were just two “trench coat” kids who liked computers, video games, and dark jokes; underneath, their dynamic was far more dangerous.
Investigators and psychologists tend to see Harris as the dominant partner – the planner, ideologue, and manipulator – and Klebold as the more passive, emotionally driven accomplice. Harris’s journals and the “Basement Tapes” frame the attack as a grandiose, quasi‑philosophical act of “natural selection”; Klebold’s writings are more about escape, annihilation, and a twisted hope that dying in some spectacular way might finally give his life meaning.
In this “toxic dyad,” Harris provided a narrative that transformed Klebold’s suicidal despair into homicidal action. For a teen who felt powerless, invisible, and unloved, the idea of joining a grand violent project with a charismatic friend who seemed to have a plan promised both belonging and a dramatic exit. That does not absolve him – his journals show that he actively embraced the plan once it crystallized – but it helps explain why a boy from a loving home ended up helping to massacre his classmates.
Planning and Participation in Columbine
Klebold was deeply involved in the year‑long planning that preceded the Columbine massacre. He helped Harris test and build explosives, including pipe bombs and the large propane‑tank bombs intended for the cafeteria. He acquired weapons using a female friend as a straw purchaser – two shotguns and a Hi‑Point carbine – one of which he modified by sawing off the barrel and stock.
His journals from this period show awareness and acceptance of the plan, even as he continued to write about sadness and romantic longing. He referred to “NBK” (Natural Born Killers) as a code name for the attack and described a future in which he and Harris would unleash their rage on the school before killing themselves. At times he expressed ambivalence, wishing he could simply run away or be with his imagined soulmate instead; at other times he reveled in fantasies of destruction, particularly against peers he felt had slighted or ignored him.
On the morning of April 20, 1999, Klebold followed through. He and Harris drove separate cars to school loaded with bombs and guns, planted duffel bags with propane bombs in the cafeteria, and took up positions outside, waiting for the explosions that never came. When the bombs failed, he was fully prepared to shift to the fallback plan: a shooting spree.
Role in the Attack
At 11:19 a.m., as Harris opened fire near the west entrance, Klebold joined in with his TEC‑9–style pistol and sawed‑off shotgun, shooting at students on the lawn and steps. Witnesses described him as less verbally aggressive than Harris but no less lethal – firing at fleeing classmates, advancing into the building, and shooting at anyone he encountered in certain hallways.
In the library, where most of the killings occurred, both gunmen moved among tables where students were hiding. Harris tended to speak more – mocking, taunting, shouting questions – while Klebold sometimes echoed him, sometimes acted more quietly, but still shot and killed students at close range. He was the one who shot and killed teacher Dave Sanders’ student helpers in one area and injured others who tried to flee. He also shot at windows and computers, contributing to the chaos and destruction even when not directly targeting people.
Video reconstruction and witness accounts suggest that Klebold’s movements were more erratic and less tactically controlled than Harris’s. His body language and speech, as described by survivors, shifted between laughter, shouting, and what some perceived as nervousness or agitation – consistent with someone operating under intense emotional strain rather than the cooler, more rehearsed demeanor Harris often displayed. Still, he remained engaged from the first shots to the last; there is no point during the attack where he clearly tried to stop or walk away.
After leaving the library and wandering the school with Harris trying to detonate more bombs, Klebold returned to the library around noon. At approximately 12:08 p.m., moments after Harris killed himself with a shotgun, Klebold sat down beside him and shot himself in the head, ending his life and the immediate threat.
Psychological Profile: “Angry Depressive”
Where many experts see Harris as a prototypical young psychopath, they see Klebold as something quite different: an “angry depressive.” Clinical profiles built from his journals, school records, and the limited video footage suggest a boy with chronic depression, low self‑esteem, social anxiety, and intense, often idealized romantic and existential fantasies.
He viewed himself as fundamentally flawed and unlovable, describing a desire to escape the pain of consciousness and to dissolve into some “other” realm where he might finally feel understood. Unlike Harris, whose writings drip with contempt for others, Klebold’s are filled with self‑contempt and longing, with bursts of rage aimed at specific people or situations that he believed had humiliated or rejected him.
Peter Langman and other school‑shooter researchers have argued that Klebold likely met criteria for a mood disorder (such as major depressive disorder) and possibly for traits of schizotypal or avoidant personality – social withdrawal, odd beliefs or perceptions, and deep sensitivity to rejection. Substance use and the influence of Harris’s more grandiose, violent ideology appear to have provided a framework that transformed his suicidal thinking into homicidal action.
Crucially, this does not make him less culpable; it contextualizes his trajectory. He was not a cold predator seeking domination so much as a profoundly distressed teen who saw himself as already dead inside, and who came to view mass murder as both revenge and a stage for his own obliteration. In his writings, there are moments where he seems to hope that someone will notice his anguish and intervene, but those moments never turned into help robust enough to divert him from Harris’s path.
System Failures and Legacy
Klebold’s case underscores a different set of system failures than Harris’s. Where Harris generated explicit threats and obvious criminal behavior, Klebold telegraphed his danger more through internalized distress: depressive writing, talk of suicide, substance use, and withdrawal. Teachers saw some concerning essays; his parents noticed mood swings and experimented with counseling; but there was no sustained recognition that he was both seriously depressed and entangled in a peer relationship that amplified his risk.
The fact that a boy from a loving, engaged family could end up helping carry out Columbine forced schools, clinicians, and parents to rethink assumptions about what a “dangerous kid” looks like. It highlighted the need to take adolescent depression and suicidality seriously, to explore not just individual risk but also the influence of close friendships, and to distinguish between kids who are merely angry and those who are both angry and suicidal – an especially volatile combination.
Dylan Klebold’s profile matters because it complicates the caricature of the school shooter as purely a monster or purely a victim. He was neither bullied‑into‑it nor brainwashed in a simple sense; he was a depressed, self‑hating teenager who chose to merge his wish to die with his friend’s wish to kill. Understanding that distinction – between psychopathic architects and angry depressives, between solitary fantasies and toxic dyads – is essential to understanding not just Columbine, but many of the copycat attacks it inspired.
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