Columbine

Timeline: Before

SOPHOMORE YEAR

January 1997 — The missions begin.

February 28, 1997 — Wayne Harris starts his journal.

March 31, 1997 — Dylan starts his journal.

Summer 1997 — Eric and Dylan start at Blackjack; build first pipe bomb.

July 23, 1997 — Dylan first mentions killing in his journal—possibly figuratively.

August 7, 1997 — Eric’s Web site is reported to the police. It lists his “I HATE” rants.

JUNIOR YEAR

October 2, 1997 — Eric, Dylan, and Zack are suspended for breaking into lockers.

November 3, 1997 — Dylan first mentions a killing spree in his journal.

Unknown — Eric and Dylan steal from the school computer room.

January 30, 1998 — Eric and Dylan are arrested for breaking linto a van.

February 15, 1998 — Deputies find a pipe bomb near Eric’s house.

February 16, 1998 — Eric begins seeing a psychiatrist and soon starts taking Zoloft.

Spring 1998* — Eric’s dad catches him with a pipe bomb.

March 18, 1998 — Dylan warns Brooks Brown about Eric’s death threats.

March 19, 1998 — Eric and Dylan conduct their intake interview for the Diversion program.

March 25, 1998 — Eric and Dylan are formally sentenced in court.

April 1998 — Investigator Guerra drafts an affidavit for a warrant to search Eric’s house.

April 8, 1998 — Eric receives his Diversion program contract.

April 10, 1998 — Eric begins his journal.

by May 9, 1998 — Eric and Dylan outline the attack, write about it in each other’s yearbook.

May 14, 1998 — Eric has switched from Zoloft to Luvox.

SENIOR YEAR

October 22, 1998 — Eric begins pipe bomb arsenal production; resumes journal writing the next day.

November 13, 1998 — Eric turns in his paper on Nazis.

November 17, 1998 — Eric describes his sadistic rape fantasies in his journal.

November 22, 1998 — Eric and Dylan buy two shotguns and a rifle at the Tanner Gun Show.

December 2, 1998 — Eric fires his weapon for the first time.

January 23, 1999 — Eric and Dylan buy the TEC-9 from Mark Manes.

January 20, 1999 — Eric and Dylan complete the Diversion program, and Dylan resumes his journal.

February 7, 1999 — Dylan submits his prescient story about killing “preps.”

March 6, 1999 — Eric and Dylan practice shooting at Rampart Range.

March 15, 1999 — Eric and Dylan begin filming the Basement Tapes.

March 20, 1999 — Eric attempts to recruit Chris Morris.

April 5, 8, 15, 1999 — Eric talks to a Marine recruiter.

April 17, 1999 — The prom.

April 20, 1999 — The massacre.

* Unknown date, approximately this period.