Research

Essays

Peterson, J. & Densley, J. (2019, Aug. 4). We have studied every mass shooting since 1966. Here’s what we’ve learned about the shooters. Los Angeles Times.

Peterson, J. & Densley, J. (2019, June 7). School shootings: What administrators need to know. Minnesota Association of School Administrators, The Leaders Forum.

Peterson, J. & Densley, J. (2019, May 9). Colorado shooting eerily recalls Columbine massacre. The Conversation.

  • Reprinted as "Columbine created the script school shooters now follow" in Fatherly.
  • Nationally syndicated, including Chicago Tribune, Houston Chronicle, Philadelphia Inquirer, San Francisco Chronicle, Yahoo!.

Peterson, J. & Densley, J. (2019, May 2). University of North Carolina at Charlotte shooting has these things in common with other campus shootings. The Conversation.

Peterson, J. & Densley, J. (2019, Apr. 17). How Columbine became a blueprint for school shooters. The Conversation.

  • Nationally syndicated, including Chicago Tribune, Houston Chronicle, Philadelphia Inquirer, San Francisco Chronicle.
  • Reprinted as "School shootings didn’t start in 1999 at Columbine. Here’s why that disaster became a blueprint for other killers and created the 'Columbine generation'" in The Washington Post.

Densley, J. & Peterson, J. (2019, Mar. 18). Terrorism is a performance. Don't watch. Star Tribune.

Densley, J. & Peterson, J. (2019, Feb. 21). We can do more to prevent mass workplace shootings like Aurora, Illinois. USA Today.

Peterson, J. & Densley, J. (2019, Feb. 8). School shooters usually show these signs of distress long before they open fire, our database shows. The Conversation.

Peterson, J. & Densley, J. (2018, Dec. 19). Editorial counterpoint: preventing mass school shootings? Here's a key first step. Star Tribune.

Peterson, J. & Densley, J. (2018, Mar. 23). Police crisis intervention training: We need a new paradigm, not a new building. MinnPost.

Peterson, J. & Densley, J. (2018, Feb. 16). Why the usual approach to school security isn't working. CNN.

Peterson, J. & Densley, J. (2017, Aug. 23). How social media sends extremism into overdrive. CNN.

Densley, J. & Peterson, J. (2017, Jun. 21). Verdict in police shooting of Philando Castile: The fear defense should have us all afraid. Star Tribune.

Peterson, J. & Densley, J. (2017, Apr. 19). Why the trend of posting gruesome acts online? Star Tribune.

Reports

Densley, J. & Peterson, J. (2017). Gun violence in America. St. Paul, MN: The Violence Project LLC. doi: 10.13140/RG.2.2.29196.00649

PEER-REVIEWED

Peterson, J., Densley, J. & Erickson, G. (in press) Evaluation of “The R-Model” crisis intervention de-escalation training for law enforcement. The Police Journal. doi: 10.1177/0032258X19864997.

Peterson, J. & Densley, J. (2018). Is Crisis Intervention Team (CIT) training evidence-based practice? A systematic review. Journal of Crime and Justice, 41, 521-534. doi: 10.1080/0735648X.2018.1484303.

Densley, J. & Peterson, J. (2018). Group aggression. Current Opinion in Psychology, 19, 43–48. doi: 10.1016/j.copsyc.2017.03.031.

Peterson, J. & Densley, J. (2017). Cyber violence: What do we know and where do we go from here? Aggression and Violent Behavior, 34, 193–200. doi: 10.1016/j.avb.2017.01.012.

Densley, J. & Peterson, J. (2016). Aggression between social groups. In B. J. Bushman (Ed.), Aggression and violence: A social-psychological perspective (pp. 275–289). New York: Routledge.

Peterson, J., Sackrison, E. & Polland, A. (2015). Training students to respond to shootings on campus: Is it worth it? Journal of Threat Assessment and Management, 2, 127–138.