A member of the anti-government Oath Keepers militia kept a death list at his house and texted other extremists about weapons before taking part in the violent siege at the U.S. Capitol in January, according to prosecutors.

Thomas Caldwell, a 66-year-old Navy veteran who authorities allege organized far-right militia members travel to Washington, D.C., and took part in the storming of the Capitol, is currently under arrest and facing multiple criminal counts related to the riot. Caldwells lawyers have requested his release from custody, but prosecutors opposed the motion, citing evidence that Caldwell represents a serious danger to the community and the country in a memorandum on Thursday.

Caldwell dehumanized those who held opposing worldviews and discussed killing them, shooting them, and mutilating their corpses to use them as shields, prosecutors state in the filing.

When authorities searched Caldwells home in Virginia on Jan. 19, prosecutors say they recovered a document which he had entitled death list and included the name of an out-of-state election official. Law enforcement also found sales receipts for hundreds of dollars in ammunition, a flag popular with far-right groups and a concealed firearm designed to look like a cell phone.

Before the riot, Caldwell also allegedly researched weapons and sent out links to other apparent Oath Keepers. One of the weapons was a Surgical Steel Tomahawk Axe which he found on Ebay, and which had the appearance of a tactical hatchet with the words zombie killer printed on the blade.