Matthew Simon Grimm, a 51-year-old British citizen, has been sentenced to nine years in prison for his role in operating an illegal online drug market that shipped controlled substances into the United States. The sentence was announced by John P. Heekin, United States Attorney for the Northern District of Florida.
U.S. Attorney Heekin stated: “Dismantling this criminal enterprise required close collaboration between our federal and international law enforcement partners, and I am incredibly proud of the successful prosecution of this offender by my office. This is yet another step toward fulfilling the promise made by President Donald J. Trump and Attorney General Pam Bondi to Take Back America from the drug traffickers flooding our communities with poison, and this substantial forfeiture of the criminally obtained proceeds of this drug distribution operation resoundingly confirms that my office will ensure that offenders cannot profit from their crimes.”
According to court documents, Grimm operated a website from 2015 until November 8, 2022, offering federally controlled substances such as synthetic cathinones, synthetic cannabinoids, and methamphetamine analogues for sale online. Orders were received through the website and shipped into the United States; records show at least 44,000 shipments were made.
The Drug Enforcement Administration (DEA) in Gainesville began investigating Grimm’s activities after making undercover purchases from his site. Payments for these transactions were made using various cryptocurrencies. As part of his sentencing, Grimm was ordered to forfeit cryptocurrency valued at more than $28 million.
Carrie-Ann Tooley, a co-defendant who worked with Grimm, was previously sentenced on April 14, 2025.
Deanne L. Reuter, DEA Miami Field Division Special Agent in Charge said: “Technology brings more ways for criminals to flood our streets with poison. DEA pursues cyber criminals with the same energy as street-level drug distributors. We will not stop until they have been brought to justice.”
Bladismir Rojo, Postal Inspector in Charge of the Miami Division stated: “The United States Postal Inspection Service is proud to stand with our domestic and international partners in identifying, disrupting, and dismantling transnational drug tracking organizations. We will pursue those who use the U.S. Mail to transport and distribute deadly drugs which impact the safety of postal employees and the communities they serve.”
Nicholas Ingegno of Homeland Security Investigations added: “This defendant and his co-conspirators pushed poison into our communities, profiting off the addiction, violence, and destruction these dangerous substances bring. HSI and our partners remain relentless in our mission to dismantle these networks and protect our communities from the devastating impact of controlled substances.”
The investigation involved cooperation among several agencies including DEA; U.S. Customs Enforcement’s Homeland Security Investigations; United States Postal Inspection Service; Naval Criminal Investigative Service; United States Marshals Service; UK National Crime Agency; UK Metropolitan Police; Netherlands National Police Corps; as well as assistance from the Justice Department’s Office of International Affairs which helped secure Grimm’s arrest and extradition from the UK in July 2024.
This case is part of Operation Take Back America (https://www.justice.gov/dag/media/1393746/dl?inline), a nationwide initiative coordinated by federal law enforcement agencies targeting cartels and transnational criminal organizations while aiming to reduce violent crime across communities.
The United States Attorney’s Office for the Northern District of Florida serves as one of 94 principal litigating offices under direction from the Attorney General.
