Use of Oregon’s Extreme Risk Protection Order law to prevent mass violence: A descriptive study

Our findings suggest that Oregon's ERPO law is being used as intended to address firearm injury risk, including mass violence risk and risk to schools and college campuses. Petitions citing mass violence threats appeared to differ significantly in terms of some characteristics from those citing non-mass violence threat types, including a higher likelihood of being granted. Further research on the use of ERPOs is needed to fully understand the barriers and facilitators to effective implementation of these laws to prevent mass violence.