On October 7, 2026, Moscow’s Gagarinsky District Court sentenced Sofya Borisovna Rozenfeld, an Arctic bird specialist and doctor of biological sciences, to three years and six months in a general-regime penal colony. Her conviction stemmed from two payments of 1,000 rubles each to Alexei Navalny’s Anti-Corruption Foundation (FBK), charged to her account in August and September 2021. Prosecutors had sought five years. She was taken into custody immediately after the verdict.
Rozenfeld did not dispute that the payments had been made. She said she had set up a recurring donation before FBK was banned and was away on a lengthy scientific expedition, without reliable communications, when the organization was declared “extremist.” After returning, she asked the foundation to cancel the payments. Her lawyers submitted the cancellation request to the court, but it did not secure her acquittal.
The court convicted her of financing extremist activity under Article 282.3(1) of the Russian Criminal Code. Human rights advocates see the case as part of the broader prosecution of Navalny’s supporters. Yet even without the political history of FBK, the circumstances raise questions: the charges concerned two automatic bank withdrawals made under an earlier standing instruction, while the defense insisted that Rozenfeld had no criminal intent.
Who is Sofya Rozenfeld?
Sofya Borisovna Rozenfeld was born in Moscow on August 9, 1976. Her father, Boris Rozenfeld, is a mathematician, and her mother worked as an electronics engineer. Her grandfather, Iosif Rozenfeld, was a Soviet scientist known for his work in chemistry.
As a child, she attended a school specializing in French. Her family emigrated to Israel in the late 1980s, but she did not want to leave Moscow, where her school, friends and familiar life remained. Roughly a year and a half later, she persuaded her parents to let her return to Russia. She subsequently lived with her grandmother and aunt.
Rozenfeld described that period of her life in a September 2024 interview with Takie Dela, an independent Russian publication. She said she had wanted to become a zoologist since the age of five.
In 1993, she enrolled in the biology faculty of Moscow State University, specializing in vertebrate zoology and ecology. She joined the university’s student nature conservation group, surveyed protected areas and took part in field expeditions.
One of her first major research assignments took her to Wrangel Island in the Arctic. There she studied nesting snow geese, counted eggs and chicks, and helped band birds alongside international researchers. The experience helped set the course for her scientific career.
After graduating in 1998, Rozenfeld began postgraduate studies at the A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences. She later became a senior researcher at its bird-ringing center.
Her work focuses on geese and other waterfowl across the northern Palearctic: population sizes, migration routes, breeding habitats, threats to individual species and ways to protect them. Gathering that evidence requires years of fieldwork, often in places inaccessible by conventional transport.
The scientist who counted birds from the air
A distinctive feature of Rozenfeld’s research has been surveying birds from aircraft. Working with pilot Georgy Kirtaev, she used light aircraft and, from 2016, a Sterkh-S1 amphibious plane built by Kirtaev.
Flying at speeds comparable to those of migrating flocks allowed the team to photograph the birds and count individual animals from the images. It also made it possible to survey vast Arctic areas without capturing the birds.
Her expeditions took her to the Taimyr Peninsula, Chukotka, Kolyma, the Yamal Peninsula and other northern regions. She also worked on international migration studies with researchers from the United States, Canada and Europe.
Such research matters beyond Russia’s borders. Migratory birds may breed in one country, stop in another and spend the winter in a third. Protecting their populations requires cooperation across their entire flyway, underpinned by reliable estimates of their numbers.
Rozenfeld was also involved in conservation advocacy. She opposed proposals that would weaken protections for rare animals and criticized legislative changes that could make it easier to kill protected species. In interviews, she argued that effective conservation policy depends on continued field research.
In autumn 2025, she presented her doctoral dissertation on the population structure, abundance, migration and conservation of northern Palearctic waterfowl. The Severtsov Institute’s official website records the defense process and a dissertation council decision dated November 6, 2025.
Some initial reports following the verdict incorrectly described her as holding a lower academic degree. Mediazona subsequently corrected its report: Rozenfeld is a doctor of biological sciences, the higher of the two research doctorates used in Russia.
At the time of her prosecution, she was involved in several research projects, including an atlas of Russia’s geese. Colleagues have warned that removing a senior Arctic ornithologist from the field for years could disrupt ongoing studies and the preparation of scientific publications.
How the criminal case began
The events at the center of the case took place more than four years before investigators searched Rozenfeld’s home.
Alexei Navalny established the Anti-Corruption Foundation to investigate suspected corruption and abuse of power by public officials and publish its findings. Private donations were among the organization’s sources of funding.
On June 9, 2021, the Moscow City Court granted prosecutors’ application to shut down FBK, the Citizens’ Rights Protection Foundation and the network known as Navalny’s Headquarters, classifying them as extremist organizations. The court ordered their activities to cease immediately. An appeals court upheld the decision on August 4.
By that time, Rozenfeld had already arranged for regular donations to FBK. According to her account, the payments were collected automatically once she had subscribed.
Two payments of 1,000 rubles were deducted from her account in August and September 2021. Those transactions became the basis of the criminal charge.
Her defense said she was on a scientific expedition with little or no access to communications when FBK was banned and the subsequent payments went through. She requested that the donations stop after she returned.
The timing is important. The bank transfers occurred after the ban had taken legal effect. The defense, however, argued that her decision to provide recurring support had been made earlier and that she gave no new instruction to transfer money when the two disputed payments were processed.
A search after a visit to Israel
According to an investigation by T-invariant, Rozenfeld learned that she was facing a criminal case on December 5, 2025.
She had recently visited her father in Israel. Boris Rozenfeld told journalists that his daughter returned to Moscow in late November; law enforcement officers searched her home shortly afterward.
Investigators seized her phone and two laptops. She was placed under a travel restriction rather than held in pretrial detention, and remained out of custody while the investigation and trial proceeded.
Proceedings continued for months. Friends said hearings were postponed, sometimes because witnesses did not appear. Rozenfeld continued her scientific work during that period.
Shortly before sentencing, she was allowed to join another expedition north of the Arctic Circle, this time involving musk oxen. She returned on October 2, 2026, five days before the verdict.
Relatives and colleagues say she had opportunities to leave Russia but repeatedly declined to emigrate. Much of her research depends on access to Russia’s Arctic territories and would have been difficult to continue from abroad.
At trial: prosecutors seek five years
The case was heard at Moscow’s Gagarinsky District Court. Mediazona’s courtroom correspondent reported that Judge Kurbanov delivered the verdict on October 7, 2026.
Prosecutors argued that the transfers to FBK, made after the organization was designated extremist, constituted financing of extremist activity. They asked for a five-year prison sentence.
Rozenfeld acknowledged having signed up to make recurring donations but rejected the allegation that she intended to finance extremism. She told the court she had wanted to support anti-corruption work, having encountered the consequences of corruption even in scientific research and nature conservation.
Her lawyers pointed to her expedition, the lack of communications and her inability to cancel the standing payment instruction in time. They submitted a letter in which she asked the foundation to stop the monthly transfers.
The court found her guilty under Article 282.3(1) of the Criminal Code and sentenced her to three and a half years in a general-regime penal colony. She was detained in the courtroom, having previously remained under travel restrictions.
FACTUM.PRESS has not obtained the full written judgment. It is therefore not possible to say precisely how the court assessed the cancellation letter, the evidence of the expedition or the defense’s arguments about intent. What is publicly documented is that those arguments were presented and did not change the outcome.
What is known about her detention
Following the verdict, Rozenfeld was taken to Moscow’s Pretrial Detention Center No. 6, commonly known as Pechatniki.
According to acquaintances, she was not allowed to collect a bag of personal belongings she had prepared before being taken from the courtroom. She initially remained in detention without the items she had intended to bring.
The human rights project If There Were No War and Memorial identified SIZO-6, run by Russia’s Federal Penitentiary Service in Moscow, as her place of detention.
The Memorial Political Prisoners Support project included Rozenfeld in its list of people facing politically motivated prosecution and reported that an appeal was expected. As of October 13, 2026, FACTUM.PRESS had found no confirmation that the first-instance judgment had become final.
Projected release dates published in some human rights databases are estimates, not guarantees. They may change depending on the appeal, the credit given for time spent in detention and other decisions about how the sentence is served.
Israeli citizenship and the family’s appeals for help
Rozenfeld holds Israeli citizenship as well as Russian citizenship. Her father lives in Israel, where she had visited him shortly before the criminal proceedings became known.
After the verdict, the case attracted attention in the Israeli media. Boris Rozenfeld said the family had approached Israeli authorities and hoped to obtain consular assistance.
The Times of Israel reported that Israel’s Foreign Ministry was in contact with the family and was working with Russian authorities to provide consular services. The ministry did not suggest it could overturn or otherwise intervene directly in the Russian court’s decision.
Dual nationality also complicates the situation. Within Russia, Russian authorities primarily regard a dual Russian-Israeli citizen as a Russian national. No diplomatic arrangement resulting in her release had been reported.
Part of a wider series of donation prosecutions
Rozenfeld is not the only person sentenced under Article 282.3 for small private donations to FBK.
In July 2025, Moscow’s Timiryazevsky District Court sentenced Ukrainian citizen Lyudmila Gonchar to three years in prison over a 1,000-ruble donation. In September 2026, supermarket employee Yelena Albegova received the same sentence.
On October 8, 2026, the Simonovsky District Court in Moscow sentenced Yelena Perepelitsa, a 60-year-old supporter of Russia’s Yabloko party, to four years in prison for seven donations of 500 rubles each, totaling 3,500 rubles.
According to a tally published by The Insider, based on known court decisions and human rights monitoring, at least 219 people had been convicted in FBK donation cases by October 8, 2026. That figure represents a minimum number of documented convictions, not the total number of investigations.
Russian law sets no minimum amount for a prosecution under the provision on financing extremist activity. Publicly reported cases have involved sums ranging from a few hundred to several thousand rubles.
Sentences vary. Some defendants have received fines, suspended terms or compulsory labor; others have been sent to prison. The available cases do not show a simple relationship between the amount donated and the severity of the punishment.
Rozenfeld’s case also illustrates how these prosecutions extend beyond opposition organizers and political activists. Those convicted include people whose work is unrelated to politics and for whom an occasional or recurring donation was a private decision. FACTUM.PRESS has also reported on the case of journalist Antonina Favorskaya, who received a prison sentence over alleged involvement with FBK under a different criminal provision.
FBK’s ban and the sentence against Rozenfeld
The Moscow City Court classified FBK as an extremist organization on June 9, 2021, after a lawsuit brought by prosecutors, who alleged that Navalny’s organizations sought to destabilize Russia’s political system. Much of the court process took place behind closed doors. The decision was condemned by international human rights organizations, including Human Rights Watch and Amnesty International, which viewed the ban as an attack on peaceful political opposition and anti-corruption activity. Their criticism invokes freedom of expression and association, protected under Articles 29 and 30 of Russia’s Constitution and Articles 19 and 22 of the International Covenant on Civil and Political Rights. Russian authorities maintain that the ban is lawful and rely on it to prosecute donors. In the view of FACTUM.PRESS, using anti-extremism legislation to criminalize financial support for peaceful anti-corruption work runs counter to the purpose of those constitutional and international protections. Rozenfeld’s sentence brings that concern into focus: she was given three and a half years in prison for two automatic transfers totaling 2,000 rubles, while her defense maintained that the standing instruction predated the ban and that she asked to stop the payments after returning from her expedition. Although the conviction rests on provisions of Russian criminal law, its justification and proportionality remain seriously contested.