This document is the official report of the investigation commission of the Finnish Ministry of Justice.

This is the official findings of the review panel from August 2007.

This report, released in November 2009, is a revised version of the original report.

This report was produced by Police Foundation and released in August, 2019.

The subtitle of this document is “A National Police Foundation Interim Review of the Impact of Communication Systems and Processes on the Response to the February 14, 2018 Marjory Stoneman Douglas High School Shooting.”

Fabrikant had a long history of conflict with the university and this report investigates his complaints.

This report documents the history of Fabrikant's years at Concordia from 1979 to 1992, highlighting his erratic behavior and warning signs of impending violence.

This report is the summary of the public inquiry conducted in the wake of the attack by Thomas Hamilton. The transcript of the court proceedings is also available on this site. The official report provides details on the life of Thomas Hamilton, as well as discussing issues related to firearm access, school security, and other topics. A published, bound copy of the report is available from Scotland, and a version is also available online as an html document. We created this pdf version from the html version and matched the pagination to that of the published report. Thus, any quotation cited from the published report can be located on the same page in this document. 

This document is the transcript of the public inquiry that was held following Thomas Hamilton's attack. Note: the pagination in this document is not reliable.

This is the final report from the Jefferson County Sheriff's Office regarding the attack at Columbine High School. (Note: The report was published as a website. This is a PDF version of the entire site. As of October 2014, the original site no longer seems to be accessible. We have added bookmarks to this document; we recommend downloading it and using the bookmarks pane in your PDF viewer to navigate. Most of the audio and video links are still functional; clicking on a link will download the audio or video media to your computer.)

This is the official report from May 2001 on the attack at Columbine.

This report reviews all the known law enforcement contacts relating to Eric Harris and Dylan Klebold prior to their attack. Most of these involved Harris and occurred in 1997 and 1998.

As stated in this document, “This report is an analysis of the fire service and emergency medical service (EMS) operations and the overall response to the assault on Columbine High School at Littleton, Colorado, on April 20, 1999. Incident command, special operations, and mass casualty emergency medical services are featured.” The report was produced by the U.S. Department of Homeland Security.

This is the official report on Steven Kazmierczak, the attack, and the university's response.

This brief review was done in the wake of Sunghee Kwon’s attack in 2015 to evaluate the university’s response and recommend improvements.

In the initial aftermath of the attack at Sandy Hook, it was reported that Adam Lanza had deleted his computer files. Among other details of the investigation, this document provides information regarding Lanza’s electronic files that investigators were able to recover. In addition, there is a summary of “The Big Book of Granny,” a piece of writing created by Lanza and a peer. The story includes a character who states, “I like hurting people … especially children.” Also, in one “episode,” Granny’s son shoots her in the head; in other words, a son shoots his own mother in the head. This is what Lanza ended up doing in real life.

This is the official report by the State’s Attorney, Stephen J. Sedensky, III, documenting the investigation of the attack by Adam Lanza.

This report was released on November 21, 2014. It reviews Lanza’s contacts with medical and mental health professionals and the missed opportunities for intervention.

This report was published by the Secret Service.

This document provides a detailed account of Pierson’s attack, the events leading up to it, and significant excerpts from his diary.

This document is actually several documents on the case, including a chronology of Patrick Purdy's life, his contacts with the mental health system and the legal system, a psychological analysis, his preparation for the attack and details of the attack itself, and his autopsy. This is the best source of information on Purdy that I have found.

This is the official report of the Santa Barbara County Sheriff’s Office on the rampage by Elliot Rodger. Though Rodger’s autobiography referred to “concentration camps,” it contained no references to Hitler or the Nazis. This official report documents Rodger’s many online searches related to Hitler, Nazis, Heinrich Himmler, and Joseph Goebbels. It also presents information on Rodger’s childhood, adolescence, education, and mental health treatment.

This is the official report on Matti Saari's attack by the Finnish Ministry of Justice.

On 8 September 1966, this official report was made public.