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3/2/2023

Treasury Sanctions Three Fentanyl Traffickers Contributing to the U.S. Opioid Crisis | U.S. Department of the Treasury

U.S. DEPARTMENT OF THE TREASURY
Treasury Sanctions Three Fentanyl Traffickers Contributing to
the U.S. Opioid Crisis
January 30, 2023

WASHINGTON – Today, the Department of the Treasuryʼs O ice of Foreign Assets Control
(OFAC) designated the leader of a Mexico-based network and two associates pursuant to
Executive Order (E.O.) 14059 for procuring precursor chemicals to manufacture and tra ic
illicit fentanyl and other synthetic drugs to the United States. Todayʼs action is the result of
ongoing e orts by U.S. agencies to disrupt the importation into and distribution of illicit
fentanyl within the United States. This action was coordinated closely with the government
of Mexico and would not have been possible without the cooperation and support of the Drug
Enforcement Administration.
“Illicit fentanyl has led to unprecedented overdose deaths in the United States, with a
majority of these drugs flowing from Mexican cartels, including the Sinaloa Cartel, using
precursor chemicals from East Asia,” said Under Secretary of the Treasury for Terrorism and
Financial Intelligence Brian E. Nelson. “The United States will continue working with the
government of Mexico to disrupt this deadly trade.”
Todayʼs designation includes Mexican national Jose Angel Rivera Zazueta (Rivera Zazueta),
the leader of a drug manufacturing and tra icking organization based in Culiacan, Sinaloa and
Mexico City, Mexico. Rivera Zazuetaʼs network operates on a global scale with nodes in the
United States, Mexico, South and Central America, Europe, Asia, Africa, and Australia. Rivera
Zazueta imports precursor chemicals from China into Mexico, which are then used to
manufacture synthetic drugs, including fentanyl, MDMA (ecstasy), crystal methamphetamine,
2C-B, and ketamine.
Rivera Zazueta has worked closely with OFAC-designated Chinese chemical transportation
company Shanghai Fast-Fine Chemicals, which has shipped various, o en falsely labeled,
precursor chemicals to Drug Tra icking Organizations in Mexico for illicit fentanyl production
intended for U.S. markets. OFAC designated Shanghai Fast Fine Chemicals on December 15,
2021, pursuant to E.O. 14059. Additionally, Rivera Zazueta is responsible for moving large

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Treasury Sanctions Three Fentanyl Traffickers Contributing to the U.S. Opioid Crisis | U.S. Department of the Treasury

quantities of cocaine from Colombia to the United States, Spain, Italy, Guatemala, Mexico, and
other countries in Europe and Central America.
In addition to Rivera Zazueta, OFAC sanctioned his associates Nelton Santiso Aguila
(Santiso Aguila), a Mexican national, along with Guatemalan national Jason Antonio Yang
Lopez (Yang Lopez), for aiding in the procurement and importation of fentanyl precursor
chemicals into Mexico for manufacturing, with the final product arriving in the United States.
OFAC designated Rivera Zazueta, Santiso Aguila, and Yang Lopez for having engaged in, or
attempted to engage in, activities or transactions that have materially contributed to, or
pose a significant risk of materially contributing to, the international proliferation of illicit
drugs or their means of production pursuant to E.O. 14059.

SANCT IONS IMPLICAT IONS
As a result of todayʼs action, all property and interests in property of these designated
individuals that are in the United States or in the possession or control of U.S. persons must
be blocked and reported to OFAC. OFACʼs regulations generally prohibit all transactions by U.S.
persons or persons within (or transiting) the United States that involve any property or
interests in property of designated or otherwise blocked persons. U.S. persons may face civil
or criminal penalties for violations of E.O. 14059.
Todayʼs action is part of a whole-of-government e ort to counter the global threat posed by
the tra icking of illicit drugs into the United States that is causing the deaths of tens of
thousands of Americans annually, as well as countless more non-fatal overdoses. OFAC, in
coordination with its U.S. government partners and foreign counterparts, will continue to
target and pursue accountability for foreign illicit drug actors.
U.S. sanctions need not be permanent; sanctions are intended to bring about a positive
change of behavior. Consistent with the findings of Treasuryʼs 2021 Sanctions Review, the
removal of sanctions is available for persons designated under counter narcotics authorities
who demonstrate a change in behavior and no longer engage in activities linked to
international illicit drug tra icking or other sanctionable activity. For information concerning
the process for seeking removal from any OFAC list, including the Specially Designated
Nationals and Blocked Persons List, please refer to OFACʼs Frequently Asked Question 897.
More information on the individuals designated today.
View a chart on the individuals designated today
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