Dave Cullen, author of Columbine 

Eric Harris' Diversion Program Intake Form

This is the ten-page questionnaire Eric filled out for his intake interview for the Diversion program. The interview took place April 19, 1998, with Eric, both his parents and his counselor Andrea Sanchez.

Note, especially, page 5. He checked half the boxes, including "homicidal thoughts." (And note that he did not check "suicidal thoughts.") His explanation just below the boxes is also revealing.