A father and son duo are facing serious federal kidnapping charges after allegedly holding two U.S. Forest Service biologists hostage at gunpoint for nearly a full day in a remote Northern California forest, according to newly released court documents.
Armed Confrontation at Gumboot Lake
Joseph Charles Henrichsen, 49, and his son Phoenix Henrichsen, 23, allegedly approached two federal biologists conducting frog habitat research near Gumboot Lake Campground on July 16. According to the criminal affidavit filed in the U.S. District Court for the Eastern District of California, Joseph wielded an AR-15-style rifle when he ordered the researchers to raise their hands. The suspects then zip-tied the victims’ wrists behind their backs and forced them into a nearby camping trailer at gunpoint.
Federal investigators detailed how Joseph separated the hostages during the ordeal, driving one biologist away in a Forest Service truck while armed. During that drive, prosecutors allege he used the victim’s phone to leave a chilling voicemail for an acquaintance, stating he had taken two federal biologists hostage and had live rounds ready. He reportedly requested that an FBI investigator be sent to negotiate.
Lengthy Standoff With Law Enforcement
The hostage situation stretched into the early hours of July 17 as Joseph allegedly refused repeated FBI negotiator requests to release the captives. Court documents reveal he escalated tensions by claiming possession of a grenade and threatening to use it if officers approached. Phoenix remained inside the trailer keeping watch over the hostages whenever his father left, according to victim statements. At one point, Phoenix alerted his father to movement in the trees, which investigators believe were law enforcement officers positioning themselves around the trailer.
The crisis prompted a massive response from FBI agents, SWAT teams, and multiple federal, state, and local agencies to the Shasta-Trinity National Forest location. Joseph finally agreed to release both biologists around 1 a.m., with each walking out safely one at a time. Phoenix surrendered to authorities approximately 2:30 a.m., followed minutes later by his father.
Federal Charges and Court Appearance
Both defendants face two counts of kidnapping federal employees and appeared in court Monday at 2 p.m. The charges carry significant potential prison time if convicted. The case highlights the dangers federal employees face while conducting routine research work in remote locations. The affidavit provides the most comprehensive account yet of the hostage crisis that unfolded in one of California’s most isolated forest regions. Both biologists escaped physically unharmed after their terrifying ordeal.