United States v. Joseph Park, 938 F.3d 354

Background

Defendant Joseph Ricky Park, a U.S. citizen with a prior Connecticut conviction for sexual offenses against a minor, lived and taught English in multiple countries and is alleged to have sexually abused children and produced child pornography while residing in Vietnam in 2015.
Park was indicted under the PROTECT Act, 18 U.S.C. § 2423(c),(e),(f), which (after amendments) criminalizes illicit sexual conduct and production of child pornography by U.S. citizens residing abroad.
The United States and Vietnam are parties to the Optional Protocol on the Sale of Children, Child Prostitution and Child Pornography; Vietnam cooperated in Park’s apprehension and does not object to U.S. prosecution.
The district court dismissed the indictment, holding Congress lacked constitutional authority (treaty power, Foreign Commerce Clause, and plenary foreign-affairs power) to reach Park’s extraterritorial conduct.
The D.C. Circuit reversed: it held § 2423(c)/(f) constitutional as applied to Park under the Necessary and Proper Clause as treaty-implementing legislation (implementing the Optional Protocol) and, alternatively, under the Foreign Commerce Clause.

Issues

Issue	Park's Argument	Government's Argument	Held
Whether Congress validly implemented the Optional Protocol by criminalizing Park’s extraterritorial conduct	§ 2423(c) is not implementing the Protocol and, as applied to non-commercial abuse/production abroad, is not rationally related to the Protocol’s goals	The PROTECT Act is a necessary and proper means to implement the Optional Protocol, which requires states to criminalize child pornography and permits jurisdiction over nationals	Yes — statute is a rationally related, necessary and proper implementation of the Optional Protocol as applied to Park
Whether the Optional Protocol and implementing statute cover non‑commercial production of child pornography	Protocol covers only commercial or transnational commercial production, so non-commercial "homemade" production abroad is outside its scope	The Protocol’s text and purpose cover production broadly (not limited to commercial) and non‑commercial production fuels the illicit market	Yes — Protocol and § 2423(f)(3) reach non‑commercial production; PROTECT Act reasonably implements the Treaty
Whether criminalizing non‑commercial child sexual abuse by U.S. nationals abroad is beyond treaty/constitutional reach	Optional Protocol targets commercial exploitation; non‑commercial abuse falls outside treaty minima and interstate/foreign commerce tests	Congress may regulate non‑commercial abuse to close enforcement gaps, deter sex tourism, and prevent relocation of offenders; such regulation is rationally related to treaty goals	Yes — statute rationally implements treaty goals; closing gaps and deterring relocation are valid treaty‑implementation aims
Whether the Foreign Commerce Clause independently authorizes extraterritorial application of § 2423	Foreign commerce power cannot reach conduct wholly abroad or non‑economic conduct like non‑commercial abuse	Aggregated non‑commercial production/use and non‑commercial abuse can substantially affect international markets for child pornography/prostitution; foreign commerce power supports the law	Yes — on the facts alleged, the Foreign Commerce Clause also supports application (market‑effects/aggregation rationale)

Key Cases Cited

Missouri v. Holland, 252 U.S. 416 (1920) (treaty power can enable Congress to enact laws necessary and proper to implement treaties)
United States v. Comstock, 560 U.S. 126 (2010) (necessary‑and‑proper rational‑relation test for federal statutes)
Gonzales v. Raich, 545 U.S. 1 (2005) (aggregation/substantial‑effects analysis under commerce power)
Wickard v. Filburn, 317 U.S. 111 (1942) (aggregation principle supporting federal regulation of locally produced goods)
United States v. Lara, 541 U.S. 193 (2004) (treaty and commerce powers can dovetail to support federal legislation)
United States v. Sullivan, 451 F.3d 884 (D.C. Cir. 2006) (non‑commercial production of child pornography can affect national market)
United States v. Durham, 902 F.3d 1180 (10th Cir. 2018) (upholding PROTECT Act application and market‑effect reasoning)
United States v. Bollinger, 798 F.3d 201 (4th Cir. 2015) (discussing scope and purpose of PROTECT Act)
Blackmer v. United States, 284 U.S. 421 (1932) (nation's jurisdiction over its nationals abroad)
Bond v. United States, 572 U.S. 844 (2014) (limits and critiques of treaty‑implementation power discussed)
Reid v. Covert, 354 U.S. 1 (1957) (constitutional limits on treaties and implementing legislation)
United States v. Lopez, 514 U.S. 549 (1995) (commerce‑clause categories framework)
McCulloch v. Maryland, 17 U.S. (4 Wheat.) 316 (1819) (foundational Necessary and Proper analysis)
Paroline v. United States, 572 U.S. 434 (2014) (digital child‑pornography market and harms)