United States Drug Enforcement Administration

LAS VEGAS – A federal grand jury in Las Vegas returned a 10-count indictment today charging six defendants, all Chinese nationals and all residing in Las Vegas, for their alleged participation in a large-scale illegal marijuana grow operation with one grow house located near a public park, announced the United States Attorney's Office for the District of Nevada.

“Transnational criminal networks that exploit our domestic markets and compromise community safety will be dismantled,” said First Assistant United States Attorney Sigal Chattah for the District of Nevada. “This operation demonstrates that what appear to be localized grow operations are frequently backed by global criminal enterprises engaged in labor exploitation, weapons offenses, and multi-million-dollar money laundering schemes. We will continue to work alongside our law enforcement partners to dismantle these sophisticated criminal enterprises that exploit public resources for illicit profit.”

“The Las Vegas Homeland Security Task Force continues to answer the call and hold accountable criminal organizations,” said Special Agent in Charge David Olesky of the Drug Enforcement Administration, Los Angeles Field Division, which oversees Nevada. “In this case, Chinese Organized Crime was intent on cashing in, operating four illegal marijuana grow houses throughout the Las Vegas area. What is especially concerning is that one of those marijuana grows was located within distance of a public park, which posed major risks to the health and welfare of community. DEA will continue to work with our federal partners to cripple these illegal drug networks and safeguard Las Vegas residents.”

“ATF works side-by-side with local, state, and federal law enforcement every single day,” said Special Agent in Charge John Wester, San Francisco Field Division, Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF). “Through joint task forces, we bring together our resources to tackle violent crime in an efficient and strategic manner. Through our participation in Homeland Security Task Forces (HSTF), ATF helps disrupt major gun and drug trafficking and cartel operations alongside DEA, FBI, HSI, and local partners. ATF will continue to work alongside our partners to ensure that Las Vegas is a safe place.”

“This case is another great example of what is possible through the unified efforts of the U.S. Marshals Service and Homeland Security,” said U.S. Marshal Gary Schofield. “The Deputies who are working side-by-side with the Task Force Officers are proud of the work they are accomplishing together.  Every day is a good day to fight the good fight and bring these criminals forward to face justice for their crimes.” 

According to court documents, from January 2025 to February 2026, Changtian Mai; Hoi Man Mak, also known as Antares Mak; Shengsheng Feng; Zhifeng Mai; Jianwen Mai; and Jianquan Mai had active roles in the growing of 1,000 or more marijuana plants and maintaining of four houses that were used as illegal marijuana grow sites throughout Las Vegas. 

Changtian Mai; Hoi Man Mak, also known as Antares Mak; Shengsheng Feng; Zhifeng Mai; Jianwen Mai; and Jianquan Mai are each charged with one count of conspiracy to manufacture a controlled substance within 1,000 feet of a protected area; one count of manufacturing a controlled substance within 1,000 feet of a protected area; and six counts of manufacturing a controlled substance. Additionally, Changtian Mai is charged with two counts of money laundering. Arraignment has been scheduled for September 1, 2026. 

If convicted, each defendant faces a maximum penalty of life imprisonment. A federal district judge will determine any sentence after considering the U.S. Sentencing Guidelines and other statutory factors.

This case was investigated by the FBI, HSI, DEA, ATF, IRS-CI, and the Las Vegas Metropolitan Police Department. The case is being prosecuted by the District of Nevada. 

This case is part of the Homeland Security Task Force (HSTF) initiative established by Executive Order 14159, Protecting the American People Against Invasion. The HSTF is a whole-of-government partnership dedicated to eliminating criminal cartels, foreign gangs, transnational criminal organizations, and human smuggling and trafficking rings operating in the United States and abroad. Through historic interagency collaboration, the HSTF directs the full might of U.S. law enforcement towards identifying, investigating, and prosecuting the full spectrum of crimes committed by these organizations, which have long fueled violence and instability within our borders. In performing this work, the HSTF places special emphasis on investigating and prosecuting those engaged in child trafficking or other crimes involving children. The HSTF further utilizes all available tools to prosecute and remove the most violent criminal aliens from the United States. The Las Vegas HSTF comprises agents and officers with the FBI, HSI, DEA, ATF, IRS-CI, the Las Vegas Metropolitan Police Department, the United States Marshals Service, and Nevada Gaming Control Board with the prosecution being led by the U.S. Attorney’s Office for the District of Nevada. 

An indictment is merely an allegation. All defendants are presumed innocent until proven guilty beyond a reasonable doubt in a court of law.