Jail documents filed by police in the city of Provo say 27-year-old Christopher W. Cleary wrote he was angry because he’d never had a girlfriend and wanted to “make it right” with a mass shooting.
Cleary is from Denver and the documents say Colorado police contacted officers in Provo on Saturday.
He was arrested on suspicion of a felony threat of terrorism charge.
The documents say investigators were concerned because the marches were happening that day, though the posts did not mention them directly.
No attorney or publicly listed phone number was immediately available for him.