Pre-Attack
Typology
Attack
100

Major sign or red flag seen by teachers

Disturbing writings

100

A major factor against the traumatized typology

His support from family

100
Item that Cho sent to the post office

Package of video clips and rants

200

Cho's middle and high school accounted for this well

Selective Mutism

200

Strong feelings about this factor of his life

Society

200

The first victims of his attack

Two residents of the WAJ dorm (one girl, one RA)

300

The period in his life when Cho moved to the United States

Elementary school age

300

Signs of severe depression/anxiety and interest in Columbine began during this period

Middle school

300

The results of the attack

33 dead, 17 injured

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