ICAC's Watchful Eye: CSAM and Torrential Downpour & Digital Surveillance
ICAC's Watchful Eye: CSAM and Torrential Downpour & Digital Surveillance
Presented at the CDAM Spring Conference 2026.
ICAC investigations increasingly rely on Torrential Downpour and similar tools that function as continuous, automated surveillance of peer-to-peer networks. This session gives defense attorneys a working understanding of how CSAM cases are built from BitTorrent evidence without requiring forensic expertise. Attendees will learn core technical concepts that routinely appear in affidavits and testimony, how those concepts are translated into legal claims, and where overstatement commonly occurs. The session also addresses Fourth Amendment search arguments as part of a broader strategy, explaining when they matter, when they do not, and how technical limits shape suppression, discovery, and trial decisions.
Take-Aways:
- A clear, lawyer-level understanding of how Torrential Downpour and ICAC BitTorrent surveillance actually works
- The key technical terms and concepts attorneys must recognize without becoming forensic experts
- How automated surveillance claims are translated into probable cause and trial evidence
- When Fourth Amendment search arguments are viable and when other strategies are more effective
- How to identify and request the specific Torrential Downpour artifacts necessary to evaluate government claims
ICAC’s Watchful Eye: CSAM and Torrential Downpour - SLIDES
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