Stories tagged with Patricia A. Tomson Center for Violence Prevention

Violence prevention wasn’t on Alan Heisterkamp’s mind when he began his career more than 30 years ago as a high school math teacher in the Sioux City School District. Heisterkamp, ‘84, had set his sights on working his way through the administrative ranks — assistant school principal, then head principal, and ultimately superintendent.

But that changed on April 20, 1999, when, along with the rest of the country, he heard the news that two high school seniors had gunned down 12 class...