The California Court of Appeals has upheld a Napa County court decision finding that a child pornographer had no reasonable expectation of privacy in files that were publically-accessible, despite his having taken measures to obfuscate them.
After the trial court denied his motion to suppress evidence, defendant Richard Evensen pleaded guilty to various sex crimes. This evidence had been obtained through software tools known as “RoundUp” that targets peer-to-peer-file-sharing networks to identify Internet Protocol (“IP”) addresses associated with known digital files of child pornography. RoundUp is only available to law enforcement officials. A public website identified one such IP address to be registered with Comcast, which, upon execution of a search warrant, revealed the subscriber of the IP address to be Evensen’s mother. A second search warrant was then executed, leading to further inculpatory evidence. Upon Evensen’s arrest, further evidence of wrongdoing was also found.