The Portugal Navy has ordered the urgent removal of a trailer loaded with volatile chemicals from its facilities due to explosion risk, a move that has pulled a sitting cabinet minister deeper into a criminal evidence scandal involving one of Europe's largest cocaine labs.
Why This Matters:
• Explosion hazard: Chemical drums seized in a major drug bust sat exposed to summer heat at a naval installation on the Tagus River's south bank until pressure buildup forced emergency relocation.
• Chain of custody breach: The trailer, seized evidence from Operation Pacoba in December 2024, ended up at a private construction firm owned by a friend of Interior Minister Luís Neves.
• Active investigation: The Portugal Judicial Police has opened a probe into the irregular movement of seized property that could confirm criminal offenses.
The Convoy of Compromises
What started as a logistical headache has morphed into a full-blown institutional integrity crisis. In early summer 2025, the Portugal Navy informed the Judicial Police (PJ) that it could no longer safely store drums of ammonia—precursor chemicals for cocaine production—that had been sitting outdoors at its installation on the Margem Sul do Tejo. Rising temperatures meant rising internal pressure in the containers, with the real possibility of violent rupture.
The PJ faced an operational dilemma: no budget allocation existed for the specialized disposal of hazardous chemical evidence. According to reporting from Correio da Manhã, the agency reached out to its network of service providers seeking someone willing to relocate the trailer on short notice.
Enter João Carvalho, owner of Construbarcelos and a personal acquaintance of the interior minister. Carvalho is said to have volunteered to tow the trailer to his company's premises in Barcelos at no charge, ostensibly as a temporary measure while the PJ located a certified disposal contractor. The drums and trailer remained parked there—until investigators discovered them last week.
Operation Pacoba: Europe's Cocaine Factory
The trailer in question was seized during Operation Pacoba, a coordinated raid in the west of Portugal that dismantled what authorities described as "one of Europe's largest cocaine production laboratories." The December 2024 operation netted drugs, firearms, cash, and multiple vehicles, including the chemical-laden trailer now at the center of controversy.
The main criminal trial stemming from Operation Pacoba is currently proceeding at the Lisbon Central Criminal Court. Yet this secondary drama—centered on what happened to evidence after the bust—threatens to overshadow the prosecution itself.
What This Means for Government Accountability
The controversy places Interior Minister Luís Neves in an uncomfortable spotlight. Neves served as national director of the Judicial Police at the time Operation Pacoba was launched and during the initial custody of the seized trailer. His transition to ministerial office did not sever his connection to the case—quite the opposite.
Investigative weekly Nascer do Sol first reported that Neves had contracted Construbarcelos to renovate a property he owns in Odemira. The same firm had previously been awarded public works contracts by the PJ during Neves's tenure as its director. Between 2020 and 2025, Construbarcelos collected approximately €1.9 million in public contracts, a figure Neves himself confirmed in an interview with TVI/CNN.
The Portugal Attorney General's Office (PGR) confirmed that it is tracking developments and, depending on its analysis, may pursue "all pertinent or appropriate measures" permitted under the law. The agency has opened a formal inquiry into property seized under Operation Pacoba.
Evidence Protocol and the Custody Puzzle
Under Portuguese law, seized evidence must remain under the strict custody of judicial or police authorities until a court orders its disposal or return. Unauthorized movement of such property can constitute a criminal offense, particularly if it involves materials tied to ongoing prosecutions.
The National Directorate of the Judicial Police issued a statement acknowledging that it had "learned that a trailer seized in a narcotics trafficking investigation had been moved and parked in Barcelos." Upon confirmation, the agency opened an inquiry to determine "the circumstances of the alleged movement, which could confirm the commission of criminal offenses."
The trailer was found hitched to a truck belonging to Construbarcelos. Both the trailer and its chemical cargo—clarified by the PJ as non-narcotic, though drug-related—are now back under police guard.
Next Steps
The outcome of the PJ's internal investigation, combined with the PGR's ongoing review, will likely determine whether formal charges are pursued. No charges have been filed, and Neves has not been formally named as a suspect in any probe. Carvalho, for his part, has not issued public comment.
For residents of Portugal, the case underscores vulnerabilities in how evidence is managed when institutional resources fall short. The lack of a dedicated budget line for chemical disposal left investigators relying on personal networks—a workaround that in this instance appears to have sidestepped proper protocol.
