A growing collection of focused investigations into
the evidence behind Columbine.
The collection
FROM THE DEATH & FORENSICS SERIES
14 Ballistic Anomalies, Lies, and Contradictions Behind Columbine’s Most Infamous Shootout
A focused investigation into Gardner’s shootout with the rifleman at the west doors, the physical evidence placing Gardner in the library, conflicting statements, and ballistic evidence that contradicts his story.
FROM THE HARRIS & KLEBOLD SERIES
A Look At Columbine’s Most Infamous Unreleased Evidence
A source-driven reconstruction of the Basement Tapes, including their reported contents, official descriptions, witness accounts from those who viewed them, the reasons they were initially suppressed, and how their legal status changed when a court ruled that they were criminal justice records governed by CCJRA rather than public records governed by CORA, and therefore were not required to be released.
FROM THE CONSPIRACY THEORY SERIES
Tracing the Origins of the Sexual Assault Allegations Concerning Deputy Tim Walsh
The source of the the rumor that Tim Walsh raped Harris and Klebold, an examination of the theory, and the origin of the file walshbuttrape.txt.
FROM THE HARRIS & KLEBOLD SERIES
Pocket-Sized “Explosives” and an Inflated Narrative: Columbine Wasn’t a Failed Bombing
A focused examination of the crude construction and limited effectiveness of the Columbine explosives, how their capabilities were amplified in later reporting, why the pipe bombs generally failed to fragment and instead blew off their end caps, why the cafeteria bombs were unlikely to function as intended, and how Harris and Klebold wired the car bombs on the morning of the attack.
FROM THE DEATH & FORENSICS SERIES
Conflicting Wounds, Ballistics Questions, and Details That Don’t Fit the Narrative
A focused examination of wounds that don't match the autopsy diagrams, along with unexplained injuries, bullet fragments, inconsistencies, and other forensic oddities.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
The Friend Eric Taught to Make Bombs Before Columbine
An in-depth investigation into the Arvada High School freshman who admitted Eric Harris taught him how to make bombs, and was arrested a month before Columbine for making a bomb with an unusually distinctive construction matching devices recovered from Harris’s bedroom.
FROM THE DEATH & FORENSICS SERIES
A Forensic Review of the Evidence Surrounding Klebold’s Death
A full analysis of Klebold’s death, addressing the rumor that Harris killed him, common misinterpretations of the crime-scene diagrams, whether suicide was physically possible based on the available evidence, and the unexplained bruise documented on the top of his head.
FROM THE NARRATIVE VS. RECORD SERIES
How Harris Became “the Psychopath” and Klebold “the Depressive” in the Public Narrative
A focused examination of the origins of the “psychopath and depressive” profile, who developed it, how Dave Cullen cemented it in the public narrative, and the curious fact that the psychopath and depressive profile was reported on television the night of the attack while investigators were still searching the Harris home.
FROM THE CONSPIRACY THEORY SERIES
MK-Ultra, Handlers, and the Hypnosis Connection to Columbine
A source-driven look at mind-control rumors, their connection to an LAPD officer who had prior contact with Rachel Scott, the alleged electromagnetic mind control device used against Scott really exists, and the possibility that some victims, witnesses, and suspects may have had “handlers.”
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
Who They Were, What They Knew, And Their Involvement In the Attack
A detailed look at the Trench Coat Mafia members by name, their reputations, and how closely each was actually connected to Harris and Klebold based on documented evidence rather than rumor or the established narrative.
FROM THE DEATH & FORENSICS SERIES
The Deaths and Disappearances of Columbine Witnesses
A detailed examination of the unusually large number of Columbine witnesses and first responders who later died, including deaths under strange or unexplained circumstances, along with witnesses who disappeared or became official missing persons.
FROM THE SHOOTER IDENTITY SERIES
A Comprehensive Investigation Into the Evidence for Additional Gunmen at Columbine
A detailed examination of the evidence for additional shooters, including why not every account can be dismissed as confusion. It also revisits the often-cited list of 101 third-shooter witnesses, separates the weak or misclassified entries from the more than 40 accounts that remain valid, and reconstructs that list more accurately from the record.
FROM THE EVIDENCE ODDITIES SERIES
Witnesses, Including Students, a Doctor, and First Responders, Reported Dead Bodies Where They Shouldn't Have Been
A focused examination of reports from witnesses and first responders who described dead bodies in locations where no official fatalities were recorded, including cases that can be explained by confusion or misidentification and others that remain difficult to account for.
FROM THE HARRIS & KLEBOLD SERIES
A Complete Guide to the Videos They Made
A visual guide to the Harris and Klebold home videos, including screenshots, production details, recording dates, plots, characters, and the people who helped film, produce, or appear in each video.
FROM THE NARRATIVE VS. RECORD SERIES
Magic Bullets, Mind-Control Rumors, and the Forced Hospitalization of a Columbine Survivor
A detailed examination of Mark Taylor’s role in the Columbine story, including his report of a rooftop sniper, his lawsuit against Luvox manufacturer Solvay Pharmaceuticals, the conspiracy claims surrounding him, his family’s allegations of threats and missing video evidence, and the events that preceded his involuntary commitment, forced medication, and subsequent loss of functioning.
FROM THE NARRATIVE VS. RECORD SERIES
The Dead Trench-Coated Gunman, the Bulletproof Vest, and the Hallway Victim Who Shouldn’t Exist
A focused examination of Dr. Chris Colwell’s account of a library scene that does not match what investigators documented, including a suspect in a trench coat, another wearing a bulletproof vest, a shooter with a gunshot wound to the back of the head, and a reported hallway victim who should not have been there.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
Rampart Range, a Phony Receipt, a Mismatched Serial Number, and an Illegal TEC-9 Sale That Doesn’t Track
A detailed examination of Mark Manes and Phil Duran, the two men involved in the TEC-9 sale to Klebold, including their backgrounds and convictions, the fake TEC-9 receipt that was actually a receipt for a Glock used in a drive-by shooting, how Manes was sentenced to 6 years in prison but got out after 19 months, and allegations that the pair may have been involved in federal gun-running activity.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
Tall Tales, Failed Polygraphs, and Other Contradictions
A focused examination of the Splatterpunks, including false and contradictory statements they gave investigators, the fact that they didn't actually pass their polygraph examinations despite claims to the contrary, and the evidence suggesting they warrant far more scrutiny than the official narrative typically gives them.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
A Red Chevy Blazer, a Burger King Alibi, and a Suspect Matching Sargent’s Description
A focused examination of Brian Sargent, including witness reports of a pudgy suspect with bushy eyebrows and a mustache who matched his appearance, accounts identifying Sargent by name, and descriptions of a suspect wearing a white dress shirt and black pants, clothing Sargent was known for wearing regularly to school.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
Contradictory Stories, Police Connections, and Unanswered Questions About Dylan Klebold's Childhood Best Friend
A detailed examination of Brooks Brown and the major discrepancies across the stories he gave investigators, including conflicting accounts of how he got home, a version that did not match his father’s account, and his claim that he called 911 when records indicate he contacted Deputy Tim Walsh instead. The dossier also examines his conversation with Harris shortly before the shooting and the questions these inconsistencies raise about what Brown knew and when.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
The Cleared Suspect Who Talked About Blowing Up Columbine 2 Weeks Before the Massacre
A focused examination of Chris “Grunt” Morris, including reports that he possessed pipe bombs two weeks before the massacre, emptied his bank account as Harris and Klebold cashed their paychecks shortly before the attack, admitted joking about placing pipe bombs in school hallways, gave conflicting accounts of how police picked him up, and was reportedly seen leaving the scene after noon despite claiming he was at Cory’s house.
FROM THE TRENCH COAT MAFIA & ASSOCIATES SERIES
The Suspicious Tan Sedan and the Friend Who Laughed While They Shot Up the School
A focused examination of Nate “Devil Man” Dykeman, including reports that Klebold’s car was seen at his house the morning of the attack, his remark while watching the scene that he knew who was responsible, conflicting statements he later gave, how he owned a tan sedan matching the description of a suspicious car seen that day, his admitted involvement in de-powdering fireworks with Harris and Klebold, and his claim that he did not realize they were making explosives.
✳ Each dossier is a standalone investigation. New files will be added to the archive as they are completed.
Behind the archive
Columbine has been the subject of my research since 1999.
I began researching the Columbine case in the early days on CRTF with a group of researchers who examined newly released records, compared witness statements, and tried to reconcile the contradictions in the case.
These dossiers bring together original documents, source citations, physical evidence, and focused analysis. They build on decades of independent research while revisiting earlier findings and pursuing new leads.
For ongoing investigations, articles, and research updates, visit True Crime: Case Reopened ↗. The publication also features Jeffrey Dahmer research by RJ Sykes.