An Argentine scientist was detained in connection with the disappearance of highly sensitive biological material from a high-security laboratory at the State University of Campinas (Unicamp) in São Paulo, Brazil, according to a March 28 announcement.
The case has raised concerns due to the potential risks associated with missing biological agents that can cause serious or fatal diseases. Authorities responded quickly because the incident involved a level 3 biosecurity lab, which handles materials capable of airborne transmission.
Soledad Palameta Miller, a 36-year-old specialist in virology and food bacteriology, was working as a teacher, researcher, and coordinator within Unicamp’s Institute of Biology when she was arrested during the early phase of the investigation. She was later released under judicial conditions but remains charged. The university reported that on February 13 it detected missing biological material from its secure laboratory facilities. Following this discovery, federal police and Brazil’s National Health Surveillance Agency (Anvisa) became involved to assist technically with the investigation.
On March 23, Unicamp publicly acknowledged the incident through an official statement after keeping it confidential for several weeks. That same day saw further developments: authorities detained another suspect linked to the theft and conducted two searches ordered by federal justice officials in Campinas. These operations led to recovery of the stolen materials, which were then sent to Brazil’s Ministry of Agriculture and Livestock for analysis.
University officials have declined to disclose details about specific viruses or bacteria involved so as not to compromise ongoing investigations but confirmed all recovered samples are now under federal custody. Meanwhile, Unicamp has launched an internal review into possible security protocol failures or additional responsibilities within its laboratories.
Palameta Miller was taken briefly to a women’s penitentiary unit before being released; she faces charges including aggravated theft, procedural fraud, and illegal transport of genetically modified organisms according to Federal Police reports. Her academic background includes studies at Argentina’s National University of Rosario followed by doctoral work in pharmaceutical sciences in Brazil focusing on epidemiological surveillance and detection tools for food- and waterborne viruses.
Her defense argues there is no conclusive evidence supporting claims of theft and says her use of shared laboratory space stemmed from lack of dedicated research facilities—an issue prompting debate about working conditions for scientists. Investigators continue examining whether others close to Palameta Miller may have been involved; authorities say their inquiry remains open.
