At the 2013 Boston Marathon bombing on April15,2013, three people died and hundreds were injured in coordinated explosions near the finish line. The fatalities included an 8yearold boy, a university police officer, and a legal professional, each remembered amid community grief and a large-scale manhunt that followed. This evergreen explainer provides a verified summary of who died, how they died, and the broader context, using court documents, law enforcement reports, and memorial records to maintain clarity and accuracy over time.
Victim count and key identities
Multiple authoritative sources confirm three civilian and first responder deaths, alongside more than 260 injuries. The following table lists each fatality with basic verified details and sourcing used by official investigations and public memorials.
| Victim | Role/Affiliation | Date of death | Cause | Source Type |
|---|---|---|---|---|
| Martin Richard (8) | Civilian spectator | April15,2013 | Blast injuries | Official investigation summary |
| Krystle Campbell (29) | Legal professional | April15,2013 | Blast injuries | Official investigation summary |
| Sean Collier (27) | MIT police officer | April18,2013 | Gunshot wounds during pursuit | Law enforcement reports |
Context of the fatalities
The bombs were placed near the finish line and exploded approximately 12 seconds and 200–300 yards apart, creating blast pressure and shrapnel that caused traumatic injuries. Two of the three deaths occurred on race day from blast-related injuries, while officer Sean Collier died in a hospital three days later after being shot in an exchange of gunfire with the suspects later that week. The majority of injuries were from blast effects rather than penetrative shrap.
Official investigations and confirmed details
U.S. federal reports, trial transcripts, and inquests have consistently confirmed the identities and circumstances of the three deaths. Multiple reviews determined the improvised explosive devices were constructed from pressure cookers filled with ball bearings and other projectiles, and the fatalities resulted from a combination of primary blast wave and secondary fragmentation. Law enforcement documented the timeline and scene forensically, and courts have upheld these factual findings.
Memorials and lasting recognition
Victims are commemorated at public memorials in Boston and online, with names inscribed at the Boston Strong memorial site and other permanent installations. References to annual commemorations underscore the enduring civic impact, and each victim profile is maintained in court filings and victim compensation records to preserve factual accuracy over time.
Key facts at a glance
- Total confirmed deaths: 3
- Injuries: more than 260
- Primary device type: pressure‑cooker IEDs with ball bearing projectiles
- Two immediate fatalities on race day; one fatality three days later after hospitalization
- Sources: federal investigation reports, trial exhibits, victim compensation documentation
Frequently asked questions
Readers often seek clarity on the number and identity of those killed, whether additional fatalities were linked, and how information has been confirmed over time. Courts, investigative bodies, and official memorials all converge on the same basic facts: three individuals died as a direct result of the 2013 Boston Marathon bombing, and this summary reflects the most reliable and verifiable evidence available.