United States v. Gregory Allen Williamson

Court of Appeals for the Eleventh Circuit·Decided June 30, 2026·No. 24-12038·Unpublished

Opinion

USCA11 Case: 24-12038 Document: 50-1 Date Filed: 06/30/2026 Page: 1 of 27

NOT FOR PUBLICATION

In the

United States Court of Appeals For the Eleventh Circuit

No. 24-12038

Non-Argument Calendar

UNITED STATES OF AMERICA, Plaintiff-Appellee,

versus

GREGORY ALLEN WILLIAMSON, a.k.a. Vlad Vlad,

Defendant-Appellant.

Appeal from the United States District Court for the Middle District of Florida D.C. Docket No. 8:21-cr-00355-WFJ-CPT-1

Before JORDAN, JILL PRYOR, and KIDD, Circuit Judges. PER CURIAM:

Gregory Allen Williamson appeals his convictions for coercion and enticement of a minor to engage in sexual activity, in

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violation of 18 U.S.C. § 2422(b); attempted production of child pornography , in violation of 18 U.S.C. § 2251(a) and (e); production and attempted production of child pornography, in violation of 18 U.S.C. § 2251(a) and (e); distribution of child pornography, in violation of 18 U.S.C. § 2252(a)(2) and (b)(1); and possession of child pornography, in violation of 18 U.S.C. § 2252(a)(4)(B) and (b)(2).

Williamson argues that the district court erred in denying two motions to suppress evidence obtained from searches of his email account and residence. He argues that the first motion should have been granted because (1) Yahoo, Inc., and the National Center for Missing and Endangered Children (“NCMEC”) functioned as agents of the government when they reviewed the contents of his email account, (2) law enforcement’s review of the contents of his email account exceeded the scope of Yahoo’s initial search, (3) the officer who applied for a search warrant of Williamson ’s home recklessly made material misrepresentations and omitted material facts when applying for the warrant, and (4) the good- faith exception to the exclusionary rule does not apply to this case. He also contends that the Yahoo search warrant violated the Fourth Amendment’s particularity requirement and that the good- faith exception to the exclusionary rule does not apply.

For the reasons explained below, we affirm Williamson’s convictions.

24-12038 Opinion of the Court 3

I. BACKGROUND

In the section that follows, we trace how Yahoo’s flagging of an email containing child sexual abuse material (“CSAM”) led law enforcement to seek search warrants for Williamson’s email account and residence, eventually resulting in criminal charges against Williamson. We then describe the procedural history of Williamson’s criminal case.

A. Offense Conduct and Investigation 1. Yahoo and NCMEC’s Initial Reviews This case started with a tip from Yahoo, a private corporation and electronic service provider. Yahoo offers its customers various services, including email. To use these services, Yahoo’s customers must first agree to the company’s terms and conditions. These terms and conditions provide that a customer cannot email or transmit through its service any unlawful content, which includes CSAM. The terms also provide that the company may prescreen , access, and disclose the contents of its users’ accounts under certain circumstances, including when the user transmits CSAM.

Yahoo uses hash values to search its users’ communications.

A hash value is “a sort of digital fingerprint.” United States v. Sotelo, 130 F.4th 1229, 1241 n.3 (11th Cir. 2025). “After companies assign a hash value to a known image of child pornography, they can scan their services for files with the same value. When they get a match, they know that the scanned file is a duplicate of the child-pornography image without opening and viewing the file.” Id. (citation

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omitted). Yahoo scans emails sent by its users against a CSAM “hash list,” which is a list of CSAM hash values.

When Yahoo’s scan reveals that an attachment to an email matches the CSAM hash list, the company then uses a human moderator to examine the image. If the human moderator determines that a particular file contains illegal pornography, all the images in the user’s account are archived and analyzed for additional illegal material. The moderator manually verifies that he has examined the suspect files. If the moderator is unsure whether an image qualifies as CSAM, he consults with Yahoo’s legal counsel. If the moderator identifies any CSAM, Yahoo then sends a report to NCMEC, a non-profit organization receiving federal funding that operates the CyberTipline, a nationwide mechanism through which CSAM is recorded and reported.

This reporting is required by federal law. When an electronic service provider, like Yahoo, has “actual knowledge of any facts or circumstances” indicating that an individual appears to have violated a child pornography law, it must take certain steps. 18 U.S.C. § 2258A(a)(1). One of the required steps is to make a report to NCMEC’s CyberTipline. 1 Id. § 2258A(a)(1)(B)(ii). Yahoo is aware of its obligations under federal law. Still, as a Yahoo employee testified before the trial court, Yahoo voluntarily scans for

1 A provider that knowingly and willfully fails to make a report is subject to

hundreds of thousands of dollars in fines. See 18 U.S.C. § 2258A(e).

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24-12038 Opinion of the Court 5

CSAM to keep its users safe and create a safe environment on its platform.

Once an electronic service provider submits a CyberTipline report, NCMEC takes it from there by conducting an independent review of the submitted images and their hash values. NCMEC has lists for various types of images, including “apparent [child pornography ],” “CP unconfirmed,” and more. Doc. 99 at 23–24. 2 An image is labeled “apparent child pornography” when it meets the federal definition of child pornography and clearly depicts a child. Id. at 66. In contrast, an image is labeled “CP unconfirmed” when the activity depicted appears to meet the federal definition of child pornography but there is some question as to the age of the person in the image. Id. at 35. At least two NCMEC analysts must review a file and come to the same conclusion before an image is put on a hash list.

When NCMEC runs its hash value analysis for an image, one of two things happens: if there is a match between a value on one of NCMEC’s lists and the reported image, the image gets the same designation. So, for example, if a reported image’s hash value matches that of an image on the “apparent child pornography” list, the reported image is also categorized as “apparent child pornography .” But if there is no match between NCMEC’s list and the reported image, NCMEC does its own analysis and assigns the image what it believes is the correct label.

2 “Doc.” numbers refer to the district court’s docket entries.

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NCMEC conducts its own analysis of an image only if the reporting electronic service provider attests that either (1) it has viewed the contents of the file, or (2) the contents of the file were publicly available. NCMEC forwards any CyberTipline reports that warrant further review to the appropriate law enforcement agency or department.

This process was followed here. Yahoo flagged an email account with the username “vladlover50@yahoo.com” for sending correspondence with an attachment matching the hash value of known CSAM. One of Yahoo’s moderators archived all the images and videos in that account. Yahoo’s moderation team reviewed the emails and found seven images it believed to be illegal CSAM. But, importantly, when a Yahoo employee was later asked which moderator reviewed each image, she was unable to identify the team member who reviewed each file.

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