Southern District of California Federal Prosecutors File 93 Border-Related Cases in One Week

SAN DIEGO – In a significant enforcement effort, federal prosecutors in the Southern District of California filed 93 border-related cases during the past week. The charges encompass a range of offenses including bringing in aliens for financial gain, reentering the United States after deportation, and importation of controlled substances.

The Southern District of California ranks as the fourth-busiest federal district in the nation, largely due to its extensive 140-mile border with Mexico. The district covers San Diego and Imperial counties and includes the San Ysidro Port of Entry, which is recognized as the world’s busiest land border crossing, linking San Diego, the eighth-largest city in the U.S., with Tijuana, Mexico’s second-largest city.

Beyond reactive prosecutions related to border crimes, the U.S. Attorney’s Office in this district actively pursues cases involving terrorism, organized crime, drug trafficking, white-collar fraud, violent crime, cybercrime, human trafficking, and national security threats. Recent updates on these prosecutions are publicly available through the office’s communications.

On October 31, 2026, Ivan Darali Sierra-Moreno, a Mexican national, was arrested and charged with Bringing in Aliens for Financial Gain. According to the complaint, Customs and Border Protection (CBP) officers discovered two individuals concealed in a compartment within the rear cargo area of a Mitsubishi Eclipse driven by Sierra-Moreno as he sought entry into the United States at the San Ysidro Port of Entry.

On the same day, October 31, 2026, Aaron Sanchez Nunez, also a Mexican citizen, was arrested and charged with Importation of a Controlled Substance. CBP officers found 168 pounds of methamphetamine hidden in the floor and rear quarter panels of a 2014 Ford Escape that Nunez was driving when he applied for entry at San Ysidro.

On November 3, 2026, Jonathan Juarez, a U.S. citizen, was arrested and charged with Importation of a Controlled Substance after CBP officers discovered 63 pounds of fentanyl concealed in the gas tank of a 2024 Nissan Frontier he was driving at the San Ysidro Port of Entry.

These immigration and drug-related cases were referred to or supported by a coalition of federal law enforcement agencies, including Homeland Security Investigations (HSI), Immigration and Customs Enforcement’s Enforcement and Removal Operations (ICE ERO), Customs and Border Protection, U.S. Border Patrol, the Drug Enforcement Administration (DEA), the Federal Bureau of Investigation (FBI), the U.S. Marshals Service (USMS), and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). State and local law enforcement partners also provided assistance.

It is important to note that indictments and criminal complaints represent allegations. All defendants are presumed innocent until proven guilty beyond a reasonable doubt in a court of law.

In related enforcement actions, a federal grand jury recently indicted 42 alleged members and associates of various San Diego County street gangs, including a notably violent and sophisticated gang based in Poway. Additionally, another indictment charged Mexican engineer Luis Manuel Hernandez Victoria with designing and constructing an advanced cross-border subterranean drug tunnel.

The Southern District of California continues to be a critical jurisdiction for federal prosecutions addressing complex and high-volume border-related criminal activity, reflecting ongoing efforts to secure the nation’s borders and uphold the rule of law.

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