John Dell'Osso

@johndellosso.bsky.social

Investigative journalist focused on corruption, money laundering and other forms of skulduggery. Game designer and founder, @investigativesimulations.org. Semi-random thoughts on transportation, bikes and music.

A story of cause and effect: Last November, Ontario banned cities from using speed safety cameras to issue tickets. Reckless speeding immediately surged in Toronto, Ottawa, Guelph, and cities throughout the province. A 🧵 about my latest in Bloomberg (gift link)

What Happens When Speed Cameras Get Shut Off

In 2025, Ontario banned automated traffic enforcement. Now the number of drivers exceeding the speed limit has surged, according to traffic data.

bloomberg.com

Meet the people who spend their days holding elected officials accountable, digging through records most people never see, and making sure no one in power operates without scrutiny. Your gift is what keeps them doing that work tomorrow, and the day after. Support our work: buff.ly/ESzaro0

UPDATE: another packed house at #IRE26 for "Strategies for investigating anonymous companies." As @dgillison.bsky.social said, the fact that we've had so many attendees over the last two years says something about how frequently journalists find themselves face to face with these kinds of firms.

John Dell'Osso@johndellosso.bsky.social · 2mo ago

@dgillison.bsky.social and I had a packed house on a Saturday morning at #IRE25 in New Orleans last year for our session on figuring out who benefits from secretive offshore companies. And now, we're bringing it back home to Washington, DC (sort of) for #IRE26 (@ire.org)

I'm speaking at IRE26.

Strategies for investigating offshore companies

Saturday, June 20, 2026 11:30am

John Dell'Osso

Douglas Gillison

🦀 🦀 🦀 We'll be at #IRE26 near Washington, DC later this week. We have answers to all your questions about how simulation games can teach journalists and public interest researchers how to follow the money. Our founder, @johndellosso.bsky.social, will be around. Come say hello!

John Dell'Osso@johndellosso.bsky.social · 2mo ago

@dgillison.bsky.social and I had a packed house on a Saturday morning at #IRE25 in New Orleans last year for our session on figuring out who benefits from secretive offshore companies. And now, we're bringing it back home to Washington, DC (sort of) for #IRE26 (@ire.org)

I'm speaking at IRE26.

Strategies for investigating offshore companies

Saturday, June 20, 2026 11:30am

John Dell'Osso

Douglas Gillison

This past weekend in Paris, investigators uncovered a vast criminal conspiracy. They followed paper trails across borders. They traced links between organized crime, professional enablers and corrupt officials. They worked under pressure. You probably didn't hear about it in the news though.

Investigators studying documents and a network chart during a simulation game in Paris.

The Anti-Corruption Data Collective found long-shot wagers — bets of more than $2,500 with less than 35% odds — on military outcomes won more than they lost. Researchers say it’s a telltale sign of “systemic insider-trading.” cbsn.ws/4uUJPG8