The defendants belong to Wild Buffalo Defense, which describes itself as, people dedicated to seeing wild buffalo roam free and protecting Indian treaties.
Earlier this week, three people from Wild Buffalo Defense were sentenced in federal court for similar protests last week at the bison quarantine facility.
In April, the Wyoming Division of Criminal Investigation found Christopher Eads was the main supplier of an area methamphetamine and heroin distribution ring.
Wyoming federal judges recently sentenced three defendants for methamphetamine and heroin crimes, according to a news release from the Wyoming U.S. Attorney's Office.
The office also announced the conviction of an Arapahoe resident for drug and firearms crimes...
Natrona County Sheriff's Sgt. Aaron Shatto confirmed Thursday that the author of the threatening letters is the same David Michael Chavis being held at the county jail.