Zero Day

Zero Day was the code-word that two students used to describe the assault they planned for over a year, and which they finally executed on May 1st, 2001. On that warm and beautiful spring day, Andre Kriegman and Calvin Gabriel, two students of Iroquois High School, walked onto to their campus with three semiautomatic weapons, a shotgun, a revolver, at least twenty explosive devices and several knives. After a mere fifteen minutes, eleven students and one faculty member were dead, eighteen students were wounded, and the two gunmen had taken their own lives. Due to the rapid influx of inquiries and requests for information reguarding the assault at Iroquois High School, the Essex County Sheriff's Department has published this website.

Timeline of Events

The time line of events describes Kriegman and Gabriel's movements through Iroquois High School during their assault. For ease of navigation, the events have been broken down into 4 separate time periods:

Period 1

Period 2

Period 3

Period 4

In Memoriam

In Memoriam

Emergency Response

The response section describes the activity of Law Enforcement and Emergency Response Services on May 1, 2001.

Aftermath & Evidence


The Investigation

Audio Recordings

The following are excerpts of audio recordings taken over the cellular phone of Omar Walters (deceased) to a 911 operator during Kriegman and Gabriel's assault on Iroquois High School.

  1. 1:Audio Clip 1

  2. 2:Audio Clip 2

  3. 3:Audio Clip 3

    4. Video Recordings

    The following are excerpts of video recordings taken from surveillance cameras in the library of Iroquois High School.

    1. Video Clip 1

    2. Video Clip 2

    3. Video Clip 3

    4. See 'Zero Day' Documentary

    In Conclusion


    Link to 'Zero Day' movie home page