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The FBI has traced Bitcoin transactions from three darknet marketplaces to Jacksonville brothers Vladislav and Stanislav Chernyshov, who were arrested August 28, 2026, and charged with conspiracy to distribute nitazenes tied to at least 12 overdoses, including three deaths.
According to an FBI affidavit and analysis by blockchain intelligence company Chainalysis, investigators traced Bitcoin withdrawals from the Nemesis, Bohemia and Abacus darknet markets to a network of cryptocurrency wallets allegedly connected to the operation.
The wallets received approximately $220,000 from darknet marketplaces and sent about $230,000, according to the investigation.
However, those figures do not necessarily represent the operation’s total sales or profits. The wallets could have received funds from other sources, moved the same money multiple times or contained balances from earlier transactions.
Chainalysis said its Reactor platform was used to reconstruct the transaction network and identify connections between cryptocurrency addresses.
The blockchain trail became more significant when investigators allegedly found connections between the target wallets and other cryptocurrency wallets linked to Stanislav Chernyshov’s mobile payment account.
The FBI combined cryptocurrency tracing with darknet marketplace records, postal records, surveillance and undercover purchases to build the case against the brothers.
The approach shows how cryptocurrency transactions can provide investigators with another layer of evidence in cases involving activity on anonymous online marketplaces.
The investigation also allegedly traced cryptocurrency from the wallet network to several destinations, including a postage provider, another drug vendor and a China-based research chemical supplier.
About $7,210 was allegedly sent to the chemical supplier, according to Chainalysis.
Rather than examining a single Bitcoin payment in isolation, investigators reconstructed the movement of funds across multiple wallets to identify links between the alleged vendor, suppliers and other services.
Prosecutors allege that BarbaraWhite sold counterfeit oxycodone pills containing several types of nitazenes.
Laboratory testing identified protonitazene, metonitazene, N-pyrrolidino etonitazene and N-pyrrolidino isotonitazene in the pills, according to the Justice Department.
The pills were allegedly made to resemble pharmaceutical oxycodone and were marketed in some listings as “fent free.”
But investigators say laboratory testing found nitazenes, a group of synthetic opioids that can be extremely potent and, in some cases, more potent than fentanyl.
Records from three darknet marketplaces allegedly showed more than 95,000 counterfeit pills sold through the operation.
The federal investigation began after a fatal overdose in Arlington, Virginia.
According to the Justice Department, investigators linked the death to a parcel containing counterfeit pills purchased through the darknet vendor.
Chainalysis said shipments associated with the operation were linked to at least 12 overdoses across the United States, including three fatalities.
The findings turned a cryptocurrency investigation into a wider narcotics case involving alleged drug sales, counterfeit pills and an international supply chain.
Vladislav and Stanislav Chernyshov each face a charge of conspiracy to distribute nitazenes.
If convicted, they could face a maximum penalty of at least 20 years in prison, according to federal prosecutors.
The FBI, Drug Enforcement Administration, U.S. Postal Inspection Service and several local and regional law enforcement offices participated in the investigation.
The case is being prosecuted by Assistant U.S. Attorneys Heather Call and Catherine Rosenberg.
The charges remain allegations, and the defendants are presumed innocent unless proven guilty in court. No trial date or plea agreement had been announced at the time of publication.
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