Costa Rica Suspect Meets US Drug Agents on 7 October
COSTA RICA · SECURITY
Key Facts
- —The country Costa Rica lies on cocaine routes from South America to the US.
- —What happened Guobin Tam Zhang met DEA agents in San José on 7 October.
- —The US case A Florida federal indictment accuses him of drug trafficking and money laundering.
- —The US role The US Embassy credited the DEA and US Treasury for his arrest.
- —The politics Lawmakers are negotiating a probe of drug money in party politics.
- —Still open No extradition date is set, and he has not been convicted.
A businessman photographed at the president’s victory party has now sat down with the US agency that helped arrest him.
A Costa Rican wanted by a Florida federal court met US Drug Enforcement Administration (DEA) agents on Wednesday, 7 October. His lawyer said the talks in San José dealt only with his Costa Rica extradition case.
The accused, Guobin Tam Zhang, has been in custody since his arrest on Friday, 2 October. His lawyer described the talks as his client’s first approach to the agency.
The US Embassy has publicly credited the DEA and the US Treasury for helping to catch him, La Nación reported on Wednesday.
The case matters beyond Costa Rica because investigators allege cocaine and drug money moved through his network toward the United States. It has also reached President Laura Fernández’s party, after he was photographed at her election-night celebration.
A First Meeting With US Agents
Officers brought Tam from the maximum-security unit of La Reforma prison to the San José courts, La Nación reported. He arrived after 10 a.m.; his lawyer said the meeting ended shortly before 5 p.m.
Defence lawyer Moisés Chinchilla called it “a first approach strictly related to the extradition process.” He said the details must stay confidential and that more meetings are likely as the case moves ahead.
Chinchilla told El Observador the sums in the file do not support calling his client a top launderer. “I think it has been exaggerated a little,” he said.
What the US Accuses Him Of
Tam, 54, was born in China, came to Costa Rica as a child and later took Costa Rican citizenship. He also uses the name Juan Carlos Tam Cheong.
Costa Rica’s Public Prosecutor’s Office said on 2 October that DEA information allegedly links him to Mexico’s Sinaloa and Gulf cartels. It also named the Clan del Golfo, a Colombian trafficking group.
A US federal indictment filed on 19 August charges him with drug trafficking and money laundering, La Nación reported. The extradition file calls him a leader of a group moving cocaine to the US since at least 2024.
According to that file, an undercover agent swapped US$240,000 in Tether, a dollar-pegged cryptocurrency, for US$231,600 in cash. An undercover buyer then received about 6 kilograms of cocaine on 15 January and about 7 kilograms on 16 February.
The file also says agents handed US$100,000 in cash to a Tam contact in Orlando, Florida, on 4 February. None of these allegations has been tested in court.
Costa Rica Runs Its Own Case
On Wednesday, organised-crime prosecutors confirmed a separate Costa Rican case against Tam, opened in January, La Nación reported. It examines crypto transactions and cocaine shipments toward the US.
A San José court ordered an initial two months of provisional detention while the US completes its formal request, CRHoy reported. CRHoy said he is the 31st Costa Rican sought for extradition on drug charges.
A 2025 constitutional amendment lets Costa Rica extradite its own citizens for international drug trafficking and terrorism, once a court approves.
A Political Storm in San José
Tam appears in photos from the 1 February celebration where Fernández marked her election win. Her governing party, Pueblo Soberano, chaired by Mayuli Ortega, denies any financial link to him.
At her weekly press conference on Wednesday, Fernández said over 200 police officers face investigation for alleged drug links, Delfino reported. She said the drug-control police would keep working “shoulder to shoulder” with international partners.
She also said she hoped prosecutors would not use the case to stage raids, which she called “shows,” El Observador reported. China’s embassy told ElMundo.CR it no longer considers Tam a Chinese citizen.
Party leaders in the Legislative Assembly spent Wednesday negotiating a special commission on drug money in politics, Delfino reported. Ruling-party floor leader Nogui Acosta pledged his caucus’s votes but wants a wider scope, La Nación reported; no vote was held.
What It Means for You
For US readers, the case shows how DEA work in Costa Rica now targets money flows, not only cocaine loads. The file describes crypto swaps and a cash drop in Florida, which puts part of the alleged scheme on US soil.
It also tests a government that courts Washington on security. Fernández told the US ambassador in September that she backs the US-led Shield of the Americas alliance, El Observador reported.
Background: Costa Rica Probes US Drug Suspect at 1 February Party and Costa Rica Extradites Five Men to US on Drug Charges.
What Is Not Known
Nobody has said what Tam and the DEA agents discussed, or whether he will fight extradition. The full US charging document has not been published.
Fernández did not say which police forces the 200 officers belong to, and she first gave a figure of 120. It is also unclear who invited Tam to the 1 February event.
What Comes Next
The United States must still send its formal documents and evidence, after which the San José court rules on extradition. The initial two-month detention, counted from 2 October, runs to early December.
The meeting does not mean Tam has agreed to go to the US or to cooperate. His lawyer described it as a procedural first contact.
Frequently Asked Questions
Who is Guobin Tam Zhang?
He is a China-born businessman with Costa Rican citizenship, also known as Juan Carlos Tam Cheong. A federal court in Florida wants him on drug trafficking and money laundering charges.
Why did he meet DEA agents?
His lawyer said the meeting on 7 October dealt only with the extradition process. The details have not been made public.
Can Costa Rica extradite its own citizens?
Yes, since a 2025 constitutional amendment, for international drug trafficking and terrorism. A Costa Rican court must approve each case.
What is the link to President Laura Fernández?
Tam was photographed at her 1 February election-night celebration. Her party denies any financial tie, and no official has been charged.
What has the US government said?
The US Embassy in San José credited joint work by Costa Rican agencies, the DEA and the US Treasury for the arrest. It said the US wants him over alleged links to drug trafficking and transnational criminal groups.
Sources: Ministerio Público de Costa Rica; La Nación (DEA meeting); La Nación (US Embassy); La Nación (local case); La Nación (US file); El Observador (lawyer); El Observador (president); Delfino (police); Delfino (commission); La Nación (ruling party); CRHoy (detention); CRHoy (extradition count); ElMundo.CR; El Observador (2025 amendment) (all accessed 8 October 2026).
Editorial responsibility: Matthias Camenzind, Editor-in-Chief · Editorial standards · Report an error