I worked as an undercover ATF agent for 25 years. Reentering normal life was harder than infiltrating biker gangs.

Tech Insider : Business
  • Frank D'alesio infiltrated criminal organizations as an ATF agent for 25 years.
  • He says that balancing undercover work and family life was challenging.
  • His family got used to him not being around, and it was hard to re-establish those connections.

This as-told-to essay is based on a conversation with Frank D'alesio, a former agent for the Bureau of Alcohol, Tobacco, Firearms, and Explosives who spent 25 years infiltrating criminal organi

He weighed over 400 pounds as an FBI undercover agent — and it became his best disguise

Tech Insider : Business, Economy, Style
Joaquin Garcia at dinner table with mobsters
Joaquin Garcia gained about 90 pounds while working undercover to infiltrate the Italian Mafia.

Courtesy of Joaquin Garcia

A former FBI Special Agent who infiltrated the Italian Mafia, Mexican cartels, and Russian and Asian organized crime groups says he fears 1 group above the rest

Tech Insider : Business, Style
Headshot of Joaquin Garcia
Joaquin Garcia received the FBI Agents Association Distinguished Service Award in 2024.

Courtesy of Joaquin Garcia

How infiltrating the mafia actually works, according to a former FBI agent

Tech Insider : Business, Style

Joaquin "Jack" Garcia is a retired FBI agent who worked 24 of his 26 years in the bureau undercover. He spent three years infiltrating the Gambino crime family under the alias "Jack Falcone."

How hit men actually work, according to a former undercover ATF agent

Tech Insider : Business, Style

Eric Immesberger posed as a hit man in undercover operations to gather evidence against people attempting to hire one.

I worked as an undercover FBI agent for 23 years. Here's what it was like infiltrating bike gangs, cartels, and neo-Nazi groups.

Tech Insider : Business
Scott Payne
Scott Payne was an undercover agent for the FBI.

Scott Payne

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