Brazil’s ‘Biggest Cocaine Bust’ Collapses as Tests Find No Drugs in Timber
Editor’s note · 18 July 2026
This article, first published on 23 June 2026, reported that Brazilian authorities had seized timber believed to contain large quantities of liquid cocaine, and linked it to a related seizure in Chile. Subsequent laboratory testing did not support those allegations.
Bolivia’s Attorney General has stated that testing on wood retained in both Chile and Brazil produced a false positive, and that forensic analysis by Bolivia’s IDIF and international laboratories found no cocaine. On 16 July 2026 Chilean prosecutors closed their investigation after confirming the false positive, and the retained cargo was released. No arrests were made in the Brazilian case.
The Rio Times should not have presented an unconfirmed preliminary finding as established fact in its headline and summary, and did not seek comment from the Bolivian exporters affected. The article below has been corrected and rewritten. A reference to American agencies tracing the cargo to a production site in Bolivia has been removed as unsupported. We regret the error. This correction is recorded in our Corrections and Clarifications log.
Brazil · Security
Key Facts
—The outcome. Laboratory testing found no cocaine in the Bolivian timber detained in Brazil and Chile.
—Case closed. Chilean prosecutors closed the investigation on 16 July 2026 after confirming a false positive, and released the cargo.
—In Brazil. Federal Police preliminary chemical tests returned negative for every sample analysed, and no one was arrested.
—The cost. Bolivian timber exports fell more than 60%, with losses put at roughly US$16 million after some 40 days of paralysis.
—What follows. Bolivian authorities and exporters are seeking a public clarification and compensation.
A case reported in June as potentially the largest cocaine seizure in Brazilian history has collapsed. Laboratory testing found no cocaine in the Bolivian timber detained in Brazil and Chile, and prosecutors in Chile have closed their investigation as a false positive.
What the tests found
Eight trucks carrying Bolivian timber were detained in June, four at Corumbá in Mato Grosso do Sul and four at Cáceres in Mato Grosso, after intelligence suggested traffickers might be using wood to conceal liquid cocaine. Early presumptive field tests appeared to indicate the drug, and the case was quickly described as a record-breaking find.
Those indications did not survive laboratory analysis. Citing police inquiry 2026.0070875-DPF/CRA/MS, the lawyer representing the hauliers, Leandro Lobo, said the Federal Police’s preliminary chemical tests returned negative results for every sample analysed. A drug-detection dog taken through the cargo did not alert, and no arrests were made.
Bolivia’s Attorney General, Róger Mariaca, went further, stating that expert analysis did not confirm the presence of cocaine in the wood held in either country, and that examinations by Bolivia’s forensic institute, the IDIF, and by international laboratories found no narcotics in more than 1,000 tonnes of retained timber.
How the Chilean case unravelled
The Brazilian detentions followed a much larger announcement in Chile. In June, Chilean authorities described a historic seizure at the port of Arica, saying cocaine and ketamine had been impregnated into Bolivian timber across dozens of containers.
That case has since been reversed. On 16 July prosecutors closed the investigation after confirming a false positive, and the detained shipments were released. Bolivia’s forestry sector described the original announcement as a media spectacle by the Arica prosecutor, and Bolivia had requested samples in order to run an independent counter-analysis.
The reversal turns on the difference between two kinds of testing. Presumptive colorimetric field tests of the cobalt-thiocyanate type are fast and portable but chemically non-specific, and false positives are a documented limitation of the method. Confirmatory laboratory analysis is what settles the question, and here it did not support the initial readings.
The cost to Bolivia’s timber sector
The economic damage was substantial and fell on an industry that was ultimately cleared. According to the Bolivian Forestry Chamber, timber exports dropped by more than 60% from June as inspections tightened and cargo releases slowed, with hauliers waiting weeks for analyses to conclude.
Producer regions put a figure on it, describing a false positive that cost 183 million bolivianos, roughly US$16 million, across some 40 days of halted exports and cancelled international contracts. On 17 July the municipal association AMDECRUZ demanded an end to the stigmatisation of the sector following what it called unfounded accusations.
Bolivian authorities and exporters are now preparing complaints and compensation claims, and have asked for a public clarification from Chile.
What remains unresolved
Two threads are still open. Brazil’s definitive expert report, prepared in Brasília, had not been published as of the middle of July, and the Brazilian cargo had remained at the dry port at Corumbá while it was awaited. It is also not yet clear whether Chilean authorities will issue a formal public clarification of their own.
What is clear is that the central allegation, that Bolivian timber was being used as a vehicle for a record quantity of cocaine, has not been borne out by laboratory analysis in either country.
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Frequently Asked Questions
Was cocaine found in the Bolivian timber?
No. Laboratory analysis in both Chile and Brazil found no cocaine. Bolivia’s Attorney General has said the initial indications were a false positive, and that Bolivia’s IDIF and international laboratories found no narcotics in the retained wood.
Has the case been closed?
In Chile, yes: prosecutors closed the investigation on 16 July 2026 and released the cargo. In Brazil, preliminary chemical tests were negative for all samples and no one was arrested, though the definitive expert report from Brasília had not been published as of mid-July.
What did the case cost Bolivia?
Timber exports fell by more than 60%, with losses estimated at around US$16 million over roughly 40 days of paralysis, alongside cancelled contracts and reputational damage in European, US and Asian markets. Exporters are seeking compensation.
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