Who Is Sebastián Marset? Uruguay’s Alleged Cocaine-Mafia Crypto Kingpin

Sebastián Enrique Marset Cabrera, a 35-year-old Uruguayan national, is jailed in Alexandria, Virginia, fighting federal charges of money laundering, high-seas cocaine smuggling, and narco-terrorism as the alleged leader of the Primer Cartel Uruguayo.

U.S. prosecutors say roughly $4 million in cryptocurrency turned up on devices seized after his arrest, a figure that has fueled the “crypto kingpin” framing now attached to his name. The evidence as reported, however, describes crypto as one alleged channel for drug proceeds, not proof that Marset built a crypto-native criminal enterprise.

Who Is Sebastián Marset? What Does the U.S. Case Allege He Did?

The Los Angeles Times reports that Marset allegedly moved cocaine shipments of 10 tons or more from South America toward Europe, with little indication in the available record that any product landed in the United States. That gap is the center of his defense: his lawyers argue in court filings that he is not accused of sending even a gram of cocaine into the country, and that prosecuting him in Virginia stretches federal jurisdiction well past its normal boundaries.

The government’s asserted financial nexus to Virginia is unusually thin for a case of this scale. Prosecutors point to a single $31,800 wire transfer from a bank in Portugal to a bank in China on February 18, 2021, which they say passed through a Bank of America computer server in the state. Marset’s attorneys counter that he took no personal action on that transfer and that evidence suggests it actually routed through Pennsylvania, calling the Virginia link both incidental and unforeseeable.

After the defense noted the charging documents only allege European destinations, prosecutors responded that they would introduce evidence at trial showing cocaine shipments reached the United States. There has been no explanation offered for why Marset has not been separately charged with that alleged conduct, a gap that leaves the jurisdictional fight very much open.

The DEA’s own March 2026 announcement of his transfer into U.S. custody focused on the money laundering conspiracy count, describing a network that allegedly used American financial institutions to move drug proceeds, according to the DEA press release.

Traders watching how prosecutors build cases against alleged trafficking-linked wallets should note that the same scrutiny extends to legitimate platforms handling large transfers. Understanding how exchange security and withdrawal controls factor into regulatory exposure is a relevant context for anyone parsing how a cryptocurrency seizure gets built into a federal indictment.

What the Crypto Evidence Seemingly Does and Does Not Show

Court records cited by the Los Angeles Times link approximately $4 million in cryptocurrency to devices seized when Marset was taken into custody.

That is a material figure in a money laundering case, and it gives prosecutors a digital paper trail that bulk cash generally does not provide. But the reporting frames the crypto holdings as one alleged proceeds channel within a broader financial picture that also includes wire transfers through the traditional banking system.

Nothing in the available primary reporting establishes that Marset operated an exchange, issued a token, ran an investment scheme, or made digital assets the organizing basis of his alleged network.

The distinction matters for how the case gets litigated: crypto money-laundering charges built on device-linked wallets are a fundamentally different evidentiary proposition from charges built on a defendant running crypto infrastructure as the core business.

Investigators seizing device-held holdings are working from what amounts to found evidence, not from dismantling an operational crypto platform.

That said, the case underscores why on-chain activity draws investigative attention regardless of the coin involved.

The same logic that has regulators scrutinizing privacy-focused cryptocurrency activity applies here: digital assets create a traceable record that prosecutors can subpoena, correlate with device data, and present as evidence of alleged proceeds, even when the underlying criminal enterprise has nothing to do with crypto markets themselves. A cryptocurrency seizure is a forensic artifact, not automatically a business model.

An Accusation is Not a Crypto Crime Business Model

Marset disputes the charges entirely. Speaking to the Los Angeles Times from jail in his first interview since his March 2026 arrest, he questioned why he was being held and rejected the premise of the U.S. case against him, telling the paper he does not owe the United States anything and that he never had any interest in the country.

Prosecutors have also alleged, separately from the financial charges, that Marset ordered violence against members of his own organization and directed the assassination of a Paraguayan prosecutor gunned down on his honeymoon, allegations Marset denies.

Those claims, along with his reported partnerships with Brazil’s Primeiro Comando da Capital and Colombia’s Clan del Golfo, remain contested assertions in an active prosecution, not adjudicated findings.

The same caution applies to the circumstances of his capture: his lawyers claim the DEA orchestrated a Bolivian raid to bypass standard extradition after Marset allegedly taunted an agent over WhatsApp, a version of events the government has not confirmed on the record.

None of that changes the narrower point about the crypto allegation specifically: a $4 million holding linked to seized devices supports a charge that crypto carried some portion of alleged drug proceeds. It does not, on the evidence reported so far, support recasting Marset as a figure who built or ran a crypto-centered criminal enterprise.

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