During a search of his home, detectives found evidence suggesting that he operated a website encouraging pedophilia and child rape.

[18] Endorsed by the Libertarian Party of Virginia, he stated in its newsletter that the primary aim of his candidacy was introducing libertarian ideas; he focused on transportation, proposing that the U.S. highway and rail systems be auctioned off to private owners who would compete to offer toll-based services,[19] and also that private property rights be extended to Chesapeake Bay.

"[13] After withdrawing his candidacy in August 2018, he offered his endorsement to Democrat Jennifer Wexton, giving as one of his reasons that the Republican incumbent, Barbara Comstock, "continually takes the side of career women".

[15] On white supremacy, he said that whites are supposedly superior to other races because of "our cultural creativeness, our willingness to invest in the long term rather than living for today, and our conscientious desire to do the right thing even if it requires heroic self-sacrifice for the good of society",[13] and must resist Jews' attempts to "attain complete supremacy" in the U.S., which would lead to their "destroy[ing] what made this country worth living in".

One of his focuses on Wikipedia was reportedly his desire to make taboo or illegal topics, including child sexual abuse, culturally acceptable.

He was blocked in 2008 and later banned from the site entirely; he first moved to Wikiversity, a Wikimedia Foundation project for learning tutorials and academic articles, then to the skeptic wiki RationalWiki.

[22] Larson also created Internet chat rooms for self-identified "incels" (involuntarily celibate men) and for pedophiles, incelocalypse.today and suiped.org, and wrote posts on the sites endorsing child rape and describing himself as a "hebephilic rapist".

[7] In 2009, Larson pleaded guilty to sending a letter in December 2008 to the U.S. Secret Service threatening to kill the President of the United States.

[26] In November 2015 a jury in Colorado denied him custody of the girl, and he announced the following month that he would seek legal termination of his parental rights.

Larson had met the victim in October 2020 and convinced her to send him inappropriate images of herself, and eventually to leave her home to fly back with him to Virginia.

[28][29][30] During a search of Larson's Virginia home, detectives found evidence suggesting that he operated a website encouraging, and facilitating sharing media of, pedophilia and child rape.