Of the 13 mass school shootings in the U.S., the three most deadly occurred in the last decade. Data from these attacks helped criminologists build a profile of the gunmen.
James Densley is a professor of Criminal Justice and Department Chair of the School of Law Enforcement and Criminal Justice at Metro State University, part of the Minnesota State system. He is the co-founder and co-president of The Violence Project Research Center, best known for its database of mass shooters. Densley has received global media attention for his work on street gangs, criminal networks, violence and policing. He is the author or co-author of seven books, including, "The Violence Project: How to Stop a Mass Shooting Epidemic," winner of the 2022 Minnesota Book Award; 50 peer-reviewed articles in leading social science journals; and over 100 book chapters, essays and other other works in outlets such as CNN, The Guardian, The LA Times, USA Today, The Wall Street Journal and The Washington Post.