Who Was Thomas Sweatt?
Thomas Sweatt was born in 1951 and grew up in rural North Carolina before relocating to the Washington, DC area as a young man. For decades he lived an outwardly unremarkable life — working fast-food jobs, keeping to himself, and drawing little attention from neighbors or coworkers.
But beginning in 1978, Sweatt began setting fires. Over the next 27 years he would ignite more than 300 blazes across Washington DC, Maryland, and Virginia — targeting homes, vehicles, and occupied buildings with escalating frequency and boldness.
His fires killed at least four people, injured dozens more, and destroyed millions of dollars in property. Yet for nearly three decades, he evaded capture entirely.
A 27-Year Timeline
Sweatt's arson campaign spanned nearly three decades before investigators finally closed in.
The First Fires
Sweatt begins setting fires in the DC area. Early incidents are scattered and go largely unconnected by investigators.
A Pattern Emerges
Fire frequency increases. Sweatt develops a signature method — accelerant-assisted fires set in the early morning hours, often targeting residential properties.
Escalation
The fires grow more frequent and more dangerous. Several result in serious injuries. Investigators begin to suspect a serial arsonist but struggle to build a profile.
Task Force Formed
A joint arson task force is established involving the DC Fire Investigation Unit, federal agencies, and local law enforcement. The investigation intensifies as fires continue.
The Break
DNA evidence recovered from an arson scene is matched to Thomas Sweatt through a database hit. Investigators move quickly to build a case.
Arrest & Confession
Sweatt is arrested at his home in Prince George's County, Maryland. He confesses to setting hundreds of fires and cooperates with investigators, providing details of crimes spanning nearly three decades.
Sentenced to Life
Thomas Sweatt pleads guilty and is sentenced to two consecutive life terms in federal prison — one of the longest sentences ever handed down for arson in the United States.
The Investigation
Catching Thomas Sweatt required the combined effort of federal and local agencies over many years. A joint task force involving the DC Fire Investigation Unit and local law enforcement worked to link hundreds of geographically scattered fires to a single offender — a task made harder by the sheer span of time and the lack of an obvious motive.
The breakthrough came through forensic science. DNA evidence recovered from an arson scene was matched to Sweatt through a federal database — the first hard evidence investigators had after nearly three decades of fires.
Once arrested, Sweatt proved surprisingly cooperative. He provided a detailed account of his crimes — naming specific addresses, describing his methods, and explaining the psychological compulsions that drove him to set fires for nearly three decades. His confessions helped investigators close hundreds of previously unsolved cases across the DC region.
What sets this book apart
Personal Correspondence
Jonathan Riffe's research goes beyond the public record. Over the course of several years, Riffe engaged in direct written correspondence with Thomas Sweatt, who remains incarcerated in a federal penitentiary.
Those letters form the emotional and psychological core of the book. In them, Sweatt reflects on his childhood, his motivations, his victims, and his life behind bars — offering a rare and unsettling window into the mind of a serial arsonist.
Riffe approached this correspondence not to sensationalize, but to understand — and to give readers a more complete picture of how someone becomes capable of the destruction Sweatt wrought on the DC community for nearly three decades.
In the Press
The Story Gets Noticed
Jonathan Riffe's years of research and personal correspondence with Thomas Sweatt caught the attention of local press — bringing the story of D.C.'s most prolific serial arsonist to a wider audience.
Read the Full Story
Thomas Sweatt: Inside the Mind of DC's Most Notorious Arsonist is available now in hardback, paperback, eBook, and audiobook.