early one fall morning in 2017, in a middle-class suburb on the outskirts of Atlanta, Chris Janczewski stood alone inside the doorway of a home he had not been invited to enter. Moments earlier, armed Homeland Security Investigations agents in ballistic vests had taken up positions around the tidy two-story brick house, banged on the front door, and when a member of the family living there opened it, swarmed inside. Janczewski, an Internal Revenue Service criminal investigator, followed quietly behind. Now he found himself in the entryway, in the eye of a storm of activity, watching the agents search the premises and seize electronic devices.
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