Joseph Henrichsen, 49, and his son, 23-year-old Phoenix Henrichsen, have been charged with kidnapping federal employees.

Joseph Charles Henrichsen, 49, and his adult son, Phoenix, are charged with kidnapping of a federal employee, officials said. An investigation into motive is underway.

Two US Forest Service workers were doing field work in a northern California forest on Thursday morning when they were abducted at gunpoint, zip-tied and led to a remote trailer,…