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Riverside County (Opens in New Window)
Agency: Hemet Sheriff’s Station Investigations Bureau
Station Area: Hemet
Written Date: June 6, 2019 Time: 8:00 A.M.
Incident Date: June 5, 2019 Time: 2:00 P.M.
Incident Location: Anza Valley
Reporting Officer: Sergeant Albert Martinez, Public Information Bureau
File Number(s):  


Sheriff Bianco heard and responded to the Anza Valley community member’s concerns and complaints regarding illegal marijuana cultivation, and authorized the Hemet Sheriff’s Station Investigation’s Bureau to research and investigate these illegal marijuana cultivation sites.

On June 5, 2019, the Riverside County Sheriff’s Department, in conjunction with allied agencies, conducted an operation in the Anza Valley (Anza, Aguanga, Sage), specific to illegal marijuana cultivation. In recent months, the Riverside County Sheriff’s Department has responded to crimes of homicide, theft, robbery, kidnapping, the theft of utilities, all associated with illegal grows.

The Hemet Sheriff’s Station Investigators spearheaded a multi-agency effort to address these community concerns. A total of about 700 Law Enforcement personnel assisted in serving search warrants at over 118 illegal marijuana grow locations within the 265 square miles of the Anza Valley.

The success of the search warrants resulted in the confiscation of:

140,877 marijuana plants (estimated at $189 million dollars street)

3,037 pounds of processed marijuana

17 rifles and 10 handguns

70 tons of plants disposed 


The following individuals were arrested for related crimes:
1) 63-year-old Hien Dinhnguyen from Hemet
     Charge 11358 HS Cultivate Marijuana

2) 48-year-old Guoyong Jiang from Rosemead
    Charge 182 PC Conspiracy

3) 61-year-old Quynn Hoang from Oakland
    Charge 182 PC Conspiracy

4) 44-year-old Dehvi Zheng from Anza
    Charge 11358 HS Cultivate Marijuana

5) 64-year-old Tieu Hoang from Oakland
     Charge 11358 HS Cultivate Marijuana

6) 66-year-old Fu Chang from Aguanga
    Charge 182 PC Conspiracy

7) 31-year-old Zhenfu Lin from Anza
    Charge 11358 HS Cultivate Marijuana

8) 33-year-old Felix Hernan from Mexico
    Charge 1551 PC Fugitive

Guoyong Jiang Quynn Hoang Dehvi Zheng
Tieu Hoang Zhenfu Lin Hien Dinhnguyen
Cite Released
Felix Hernan
Cite Released
Fu Chang
Cite Released


There are numerous businesses throughout Riverside County that have obtained permits and operate legal marijuana cultivation sites. These businesses properly dispose of waste products and follow the legal process. Illegal marijuana cultivation is harmful to the environment and community.

Our policing strategies include a proactive approach utilizing the proven philosophy of Community Oriented Policing. Sheriff Bianco understands that the best way to solve our quality of life issues is to work hand in hand with the community to identify these issues and address them before they become real problems. Sheriff Bianco strives for an open and transparent dialog with our communities to build a much needed relationship of trust.

The Riverside County Sheriff’s Department would like to thank: San Diego County Sheriff, Orange County Sheriff, Los Angeles County Sheriff, Kern County Sheriff, Riverside County District Attorney’s Office, Riverside Police, Hemet Police, Murrieta Police, Cathedral City Police, Riverside County Gang Task Force, PACT Team, Coachella Valley Narcotic Task Force, CA Fish and Game, FBI, US Drug Enforcement Administration, Cal Fire, American Medical Response, Riverside County Animal Services, CA Water Board, Riverside County Code Enforcement, and the Riverside Sheriff’s Association for their assistance and partnership on a successful operation to combat illegal marijuana grows in the County of Riverside. We would also like to thank the California Army National Guard for use of their equipment and vehicles in the transportation and destruction of marijuana.


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