United States v. One Tyrannosaurus Bataar Skeleton
A million-dollar fossil, disputed customs paperwork, and the difference between protecting a nation’s heritage and owning it. How the government pleaded its way toward returning a dinosaur to Mongolia.
People and parties
District judge
Select a participant for details.
The defendant had been dead for millions of years
At the May 20, 2012 auction, the skeleton fetched $1,052,500, subject to the outcome of litigation on Mongolia's behalf. It was seized before delivery to the buyer. The caption that followed named the skeleton itself because the United States was pursuing civil forfeiture against property—an action in rem. Eric Prokopi, the fossil dealer who claimed ownership, supplied the opposition. [1] [2]
The caption gets the attention. The amended complaint does the legal work. Before the government could obtain the fossil, it had to connect particular bones to particular importations, connect their removal to an ownership law, and plead facts supporting the required knowledge. Judge P. Kevin Castel initially questioned whether it had done enough. The amended complaint survived, but the November 2012 decision did not finally adjudicate Mongolian ownership or order repatriation. [1] [2]
An auction display is not a shipping manifest
The government's first account looked straightforward: a valuable Mongolian dinosaur had entered the United States with paperwork giving a much lower value and a different country of origin. The September proceedings exposed a more complicated object. Prokopi's lawyer said the display combined imported material with bones acquired domestically, and that considerable cleaning and assembly had created much of its value. He also disputed whether the mounted skeleton came from a single animal. Those were counsel's representations, not judicial findings. [2]
That mattered to the comparison between a $15,000 customs declaration and a million-dollar auction result. The declaration concerned one shipment; the auction concerned the assembled display. A difference between those figures was worth investigating, but it was not a substitute for identifying what had actually crossed the border. [2] [1]
The amended complaint identified three shipments with declared values totaling $69,000, while acknowledging as many as four international shipments. Their paperwork named Great Britain or Japan as the origin. It also alleged that a March 2007 shipment initially identified Mongolia, then changed to Japan after information supplied by Prokopi. Castel treated the valuation disparity as supporting a reasonable inference of a knowing misstatement, while expressly recognizing that additional material and preparation work might ultimately explain it. [1]
The bones carried their own provenance
A species name alone did not settle the national-origin question. In September, the judge asked about remains found outside Mongolia and whether an animal could have ranged across what are now national borders. A modern border on a map could not establish where these particular bones were excavated. [2]
The amended pleading supplied a more specific answer. Paleontologists linked the bones' distinctive coloration to Mongolia's Nemegt Formation. They also addressed the possibility of a composite: their opinion was that all the bones came from Mongolia even if more than one skeleton supplied them. The alleged excavation window was 1995–2005. Castel accepted those allegations for the motion; he did not conduct a trial resolving competing experts. [1]
For a lawyer, the point is evidentiary. When the paperwork's account is disputed, the object's physical characteristics can help reconstruct provenance. Here that evidence also connected the object to the period in which a claimed ownership law had to apply. [1]
From auction to return
The skeleton sells conditionally for $1,052,500 at Heritage's New York auction. Litigation on Mongolia's behalf remains unresolved. [1]
The United States files its forfeiture complaint. Castel issues a seizure warrant the following day. [1]
Castel questions the original account of origin, value and knowledge, and gives the government an opportunity to amend. [2]
The amended complaint survives Prokopi's motion to dismiss. Ownership and liability are not finally determined. [1]
Prokopi pleads guilty in the related criminal case and consents to forfeiture of this skeleton, according to ICE. [3]
- February 2013
A judgment forfeits the skeleton to the United States for return to Mongolia, according to ICE. [3]
U.S. officials return the skeleton to the Mongolian government at a ceremony in New York. [3]
Could these allegations support forfeiture?
That was the immediate question. Supplemental Rule G(2)(f) required enough factual detail to support a reasonable belief that the government could meet its eventual trial burden. The court also applied the plausibility approach associated with Twombly and Iqbal, alongside the particularity requirements of the Supplemental Rules. Legal conclusions alone would not do; a completed evidentiary case was not required at this stage. [1]
The United States argued that expert provenance, false entry information and Prokopi's experience excavating in Mongolia supported the necessary inferences. It invoked three forfeiture routes, based on stolen property and unlawful importation. [1]
Prokopi challenged both the legal rules and the factual inferences. How could an importer have fair notice of valuation and origin requirements for fossils without specific guidance? Did Mongolian law actually vest ownership in the state, or merely protect heritage? And had the government sufficiently alleged that he knew the bones were stolen? [1]
Protection and ownership do different work
The controlling distinction came from the Second Circuit's United States v. Schultz: a foreign law that genuinely establishes state ownership can make unauthorized removal theft for purposes of the National Stolen Property Act. A law that merely restricts export does not, for that reason alone, make the object stolen. The United States therefore needed a viable ownership theory, not simply proof that Mongolia disliked the export. [1]
Prokopi emphasized the 1992 Mongolian Constitution's language of state protection and provisions recognizing some private ownership. The complaint also cited the 1924 Rules to Protect the Antiquities and the 2001 Law on Cultural Heritage, with language appearing to vest ownership of relevant finds in the state. Castel considered that sufficient for pleading purposes, while leaving their definitive interpretation and application open. [1]
This reservation matters. Rule 44.1 treats the content of foreign law as a legal question and permits consideration of relevant materials beyond ordinary evidentiary restrictions. Castel could have decided that question at the dismissal stage. He expressly chose not to make a final determination in this interlocutory order. The holding was that the pleaded ownership provisions supported a claim, not that every Mongolian fossil was conclusively state property. [1]
Prokopi also argued that Mongolia needed to enforce its ownership laws actively. The court treated enforcement as potentially useful evidence of whether a law really asserted ownership. It did not make an allegation of active enforcement a prerequisite to a complaint relying on statutes that appeared on their face to vest title in the state. [1]
A fossil still needs truthful paperwork
The notice challenge to customs rules failed for a direct reason: the claim rested on allegedly knowing false statements, not on violating an obscure fossil-specific classification rule. The court held that the prohibition supplied adequate warning. Prokopi's alleged expertise and the changed origin information supported an inference of knowledge. Whether he actually lacked that knowledge was a different question. [1]
The foreign-law objection received a narrower answer. Castel did not declare that every importer necessarily knows Mongolian law. A misunderstanding could bear on knowledge that an object was stolen, and a vagueness objection might matter later. Neither defense was established on the face of this complaint. Denying dismissal preserved those questions rather than resolving them against Prokopi after trial. [1]
Three routes, different burdens
The government had three statutory routes to the same skeleton. Which route it used changed both the burden of proof and the defenses available. [1]
- Under 18 U.S.C. § 981(a)(1)(C), it alleged property constituting or derived from proceeds traceable to National Stolen Property Act violations. Sections 2314 and 2315 supplied the stolen-property predicates, including the $5,000 threshold, interstate or foreign movement, and required knowledge. [1]
- Under 18 U.S.C. § 545, it pursued merchandise imported contrary to law, including through material false statements under § 542. A false origin statement can matter because it affects a customs official's assessment of whether the object is stolen. [1]
- Under 19 U.S.C. § 1595a(c), it had to establish both introduction contrary to law and that the merchandise was stolen, smuggled or clandestinely introduced. Those are distinct requirements even when the same facts support both. [1]
For the two Title 18 routes, the Civil Asset Forfeiture Reform Act placed the ultimate burden on the government by a preponderance of the evidence and supplied an innocent-owner defense, which the claimant must prove. The Title 19 route fell within CAFRA's customs exclusion: the government first had to establish probable cause, after which the burden shifted to the claimant. That route did not carry CAFRA's innocent-owner defense. A defense addressing only one statutory path could therefore leave another untouched. [1]
The skeleton goes home
The November ruling kept the civil case alive. Prokopi’s later criminal plea changed its course. ICE reported that Prokopi pleaded guilty on December 27, 2012 to a scheme involving illegally imported dinosaur fossils and consented to forfeiture of this skeleton. A forfeiture judgment followed in February 2013, and the return ceremony took place on May 6. Those later events supplied the outcome that the November opinion had only allowed the government to pursue. [3]
The decision's doctrinal use extended beyond fossils. In United States v. A 10th Century Cambodian Sandstone Sculpture, the Southern District of New York relied on Bataar when rejecting an argument that the government had to plead active enforcement of Cambodia's ownership laws. The connection is the distinction between what supports a forfeiture complaint and what may matter in a final determination of foreign ownership. [4]
The distinction still appeared in ordinary property litigation in 2025. In United States v. Real Property commonly known as 4223 State Highway 30, the Northern District of New York cited Bataar for considering an affirmative defense on a dismissal motion when it appears on the face of the complaint. It declined to resolve the claimants’ innocent-owner theory because the complaint did not establish it, including when and how their interests arose. The court expressly left a properly raised defense for later. The dinosaur case’s useful afterlife includes this procedural point, quite apart from cultural heritage. [6]
What a lawyer should carry forward
Start by reconstructing the property. The thing displayed at auction, the material in a shipping crate and the property described in a complaint may not be identical. Identify the components and acquisition history before treating price differences as proof of false declarations. [1] [2]
Then separate origin, title and knowledge. Scientific provenance helps locate a find. The law applicable at removal or excavation must support the ownership theory. Evidence of experience, communications and entry paperwork may support knowledge. Strength on one question does not eliminate the others. [1]
Finally, map each forfeiture statute to its own burden and defenses. This district-court pleading decision is useful for that disciplined analysis. It is not a nationwide rule forbidding private fossil ownership, and surviving dismissal is not the same as proving entitlement to the property. [1]
Sources and citations
- November 14, 2012 memorandum and order
No. 12 Civ. 4760 (PKC), 2012 WL 5834899. Background I–II; Discussion I (pleading), II(a)–(c) (statutes), III(a)–(b) (notice), IV (ownership), notes 5–9. Pinpoints: Background I–II for the auction and shipments; Discussion III(a) and note 6 for valuation; Discussion IV and notes 8–9 for foreign law.
- September 7, 2012 memorandum and order
P. Kevin Castel · Docket 19 · pp. 1–4. Questions about the original complaint and opportunity to amend.
- ICE announces return of the skeleton to Mongolia
May 6, 2013 · Official agency account of the December plea, February forfeiture and May return. Subsequent events are attributed to this account.
- United States v. A 10th Century Cambodian Sandstone Sculpture
No. 12 Civ. 2600 (GBD) · S.D.N.Y. · March 28, 2013 · Legal Standard and I.B.1. Later application of the foreign-ownership pleading analysis.
- Illustration references
Generated editorial illustrations, not historical photographs. Castel identity reference: Criterio.hn, photographer unidentified. Skeleton reference: AP photograph published by Voice of America. United States flag reused from the Lexten asset collection.
- United States v. Real Property commonly known as 4223 State Highway 30
No. 1:24-cv-1501 · N.D.N.Y. · September 30, 2025 · Docket 46, pp. 25–27 and n. 6. Later citation on affirmative defenses at the pleading stage.
Later treatment checked October 6, 2026 through public sources; this is not a comprehensive citator review.