# DC mass shooter who killed one and injured for then shot himself dead named as Dr Matt Lambert

- URL: https://talkfuse.com/story/dc-mass-shooter-who-killed-one-and-injured-for-then-shot-himself-dead-named-as-dr-matt-lambert/
- Published: 2026-11-12T18:15:30+00:00
- Original publisher: Daily Mail (publisher lean: Right)
- Original article: https://www.dailymail.com/news/article-16288167/matt-lambert-washington-dc-shooting-gunman.html?ns_mchannel=rss&ns_campaign=1490&ito=1490
- Topics: World

## Key points

- Dr Matt Lambert was named as the gunman.
- Police are examining his dispute with the building association.
- He killed himself after an hour-long standoff.

## Summary

New details identify the suspect as Dr Matt Lambert, a 55-year-old doctor and medical technology executive, who was reported to have lost a lawsuit over water damage at his home before the shooting. Police said they were investigating a conflict between Lambert and the building’s homeowners’ association as possible context for the attack.

Lambert killed a man and injured four others in or near a Washington, DC, gym, then barricaded himself in his apartment. After negotiators spoke with him for about an hour, police heard a gunshot and found him dead from a self-inflicted wound. Lambert had claimed that renovation work caused water damage and mould in his flat, and posted that his “manifesto” was an engineering report.

## Coverage

- [Daily Mail: DC mass shooter who killed one and injured for then shot himself dead named as Dr Matt Lambert](https://www.dailymail.com/news/article-16288167/matt-lambert-washington-dc-shooting-gunman.html?ns_mchannel=rss&ns_campaign=1490&ito=1490)
- [New York Post: DC gym shooter ID’d as Dr. Matt Lambert — who went berserk at HOA over black mold in his $1.1M apartment](https://nypost.com/2026/11/12/us-news/matt-lambert-idd-as-dc-shooter-doctor-who-went-berserk-over-hoa-dispute-about-black-mold-in-1-1m-apartment/)

---
Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.