The document summarizes key findings from a 2002 US Secret Service study on school violence incidents between 1974 and 2000. Some of the main points are: 1) There is no single profile of attackers, who varied in family background, age, ethnicity, school performance, and social activities. 2) Many attackers felt bullied or injured by others prior to the attack. 3) The attacks were rarely sudden or impulsive, with most attackers planning the violence at least a month in advance.