A United States court has sentenced a Nigerian, Ehis Lawrence Akhimie, to over eight years in prison for his role in a transnational inheritance fraud scheme that defrauded more than 400 elderly victims of over $6m.

The U.S. Attorney’s Office for the Southern District of Florida, in a statement on Monday, said Akhimie, 41, was sentenced on September 11 to 97 months’ imprisonment after pleading guilty to conspiracy charges.

According to court filings as indicated in the statement, Akhimie and his accomplices sent personalised letters to victims in the U.S., posing as bank officials in Spain. The letters claimed the recipients were entitled to multimillion-dollar inheritances from relatives who had purportedly died overseas.

Victims were told that before they could access the inheritance, they had to pay various fees, including delivery charges, taxes, and other payments to avoid “government scrutiny”. The funds, however, were siphoned through a network of intermediaries, including former fraud victims in the U.S., who were manipulated into acting as conduits for the syndicate.

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U.S. prosecutors said no victim received any inheritance. Instead, the fraudsters enriched themselves while targeting some of the most vulnerable members of society.

“Akhimie and his co-conspirators collected money victims sent in response to the fraudulent letters through a complex web of U.S.-based former victims, whom the defendants convinced to receive money and forward to the defendants or persons associated with them. Victims who sent money never received any purported inheritance funds. In pleading guilty, Akhimie admitted to defrauding over $6 million from more than 400 victims, many of whom were elderly or otherwise vulnerable,” the statement read.

U.S. Attorney Jason Quiñones described the offence as a betrayal of trust, “Schemes like this steal not only money but dignity from our seniors. Our Office stands with victims, ensures their voices are heard, and will relentlessly pursue those who prey on them,” he said.

Assistant Attorney General Brett A. Shumate of the Justice Department’s Civil Division stressed the role of global collaboration in tackling cross-border fraud.

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“The Justice Department will continue to pursue, prosecute, and bring to justice transnational criminals responsible for defrauding U.S. consumers, wherever they are located. This case is a testament to the critical role of international collaboration in tackling transnational crime.

“I want to thank our U.S. law enforcement partners, as well as those who assisted across the globe, including the National Crime Agency and Crown Prosecution Service of the United Kingdom, for their outstanding contributions to this case,” Shumate said.

The U.S. Postal Inspection Service, which investigated the case alongside Homeland Security Investigations, also pledged to maintain its crackdown on financial fraud.

Acting Inspector in Charge, Bladismir Rojo, said, “We are committed to protecting American consumers from being defrauded by transnational criminal organisations. We will continue to work with the Department of Justice to deliver justice.”

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Similarly, Acting Special Agent in Charge Ray Rede of HSI Arizona added: “Defrauding the elderly and other vulnerable populations is a betrayal of not just trust but of humanity. Justice will prevail, and those who exploit others for personal gain will be held accountable.”

Akhimie is the eighth defendant sentenced in the sprawling case. In April, another Nigerian, Okezie Bonaventure Ogbata, who was extradited from Portugal, was handed the same 97-month sentence by District Court Judge Roy Altman.

At the time, Judge Altman described the offence as “an incredibly serious crime” that demanded strong punishment to protect “the most vulnerable, the least protected members of our society.

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Other defendants had previously received jail terms in related proceedings before U.S. District Judge Kathleen Williams.

The Department of Justice said the probe benefited from assistance provided by Europol, and authorities in the UK, Spain and Portugal, alongside its Office of International Affairs.

The case has again spotlighted Nigeria’s recurring link with cross-border fraud. U.S. authorities have, in recent years, prosecuted several Nigerians in high-profile scams, ranging from internet fraud to romance scams.