Crime Solvers Central's mass murder database lists 281 mass killings in which 1,836 people were killed and 2,278 injured. Each incident lists the date, place, offender, weapons and every victim, and victims link to their own case pages. It is updated nightly from several national databases.
Numbers updated November 14, 2026. Crime Solvers Central has helped close more than 307 cases.
There is no single database with every case. These are the main ones and what each is best for.
| Database | Run by | Covers | Area | Cost | Best for |
|---|---|---|---|---|---|
| Academic mass shooting databases | University and nonprofit researchers | Mass public shootings (4+ killed) | U.S. | Free | Detailed research data on offenders and incidents. |
| Gun violence trackers | Nonprofits | All U.S. gun violence, including mass shootings (4+ shot) | U.S. | Free | Near real-time incident reports. |
| Mother Jones mass shootings database | News organization | Public mass shootings since 1982 | U.S. | Free | Long-running journalist-compiled list. |
| FBI active shooter reports | FBI | Active shooter incidents | U.S. | Free | Official annual reports. |
| Crime Solvers Central | Independent, volunteer-run | Mass killings with every victim, plus serial killers, missing persons and unsolved homicides | Mainly U.S. | Free list and details; full write-ups for members | Each victim linked to their own case page. |
The mass murder list, each incident's key details, victims and one source link are free. Members also get the full write-up, every source link, videos and the forum discussions. See membership options.
Journalists and researchers are welcome to cite these numbers. For charts by state, decade, age and sex, see the statistics dashboard.
Yes. Several research groups and news organizations keep one. Crime Solvers Central lists 281 incidents with every victim, and links each victim to their own case page.
Most researchers use four or more people killed in a single event, not counting the offender. Some mass shooting counts use four or more people shot, killed or injured.
A mass murder happens in one event. A serial killer kills people in separate events over time. See the serial killer database.
Nightly. New incidents are imported automatically, reviewed and published. The numbers on this page were last updated November 14, 2026.
Crime Solvers Central is an independent, volunteer-run case research and advocacy site, not a law enforcement agency. In an emergency call 911. Questions? Contact us.
