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Sheriff's Office - Drug Task Force

Posted on: November 8, 2023

HCDTF Serves Search Warrant in Eureka- Two Arrested

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On November 7th, 2023, Humboldt County Drug Task Force Agents served a search warrant at the residence of Lander Oppen (Age 33) located in 300 block of Quail Valley Rd. in Eureka. After a multi-week investigation, the HCDTF believed Oppen was in possession of large quantities of Cocaine and Ketamine for the purpose of sales. 

Upon arrival at the residence, agents located Oppen on the property where he was detained without incident. Agents also located and detained William Robert Briggs (Age 46), inside of the main residence. 

Once the scene was secure, agents began searching Oppen’s residence. In the garage area, agents located approximately 1.2 pounds of Ketamine, 8.8 ounces of MDMA (Methylenedioxy-Methamphetamine), 2.5 ounces of MDA (Methylendioxy-Amphetamine), ½ ounce of cocaine, 6 vials of LSD (Lysergic Acid Diethylamide), 3 pounds of dried psilocybin mushrooms, 7.5 ounces of Psilocybin gummies, 38 Psilocybin capsules, 61 tablets of Diazepam, over $27,000 in US Currency, packaging materials, and digital scales. 

Agents also searched a bedroom that Briggs was believed to be residing in. During the search, agents located a Polymer 80, 9mm handgun. The 9mm handgun was non-serialized and equipped with a threaded barrel.  

Oppen was transported to the Humboldt County Jail where he was booked for the following charges:

  • 11378 HS                   Possession of a controlled substance for sales
  • 11366 HS                   Operating/maintaining a drug house 
  • 11351(A) HS              Possession of narcotics for sales

 Briggs was transported the Humboldt County Jail where he was booked on the following charges:

  • 30605 PC                    Possession of an assault weapon 
  • 32000 PC                    Illegal manufacturing of a firearm

 Anyone with information related to this investigation or other narcotics related crimes are encouraged to call the Humboldt County Drug Task Force at 707-267-9976.

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William Briggs Booking Photo

William Briggs Booking Photo | Humboldt County Correctional Facility

Lander Oppen Booking Photo

Lander Oppen Booking Photo | Humboldt County Correctional Facility

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