A white supremacist from Florida was arrested by federal authorities for making racially motivated threats against the co-founder of the Charlottesville, Virginia, chapter of Black Lives Matter, who had intended to run for city council.

Daniel McMahon, a 31-year-old who went by “Jack Corbin” online, was indicted on four counts: willful interference with a candidate for elective office, bias-motivated interference with a candidate for elective office, threats to injure in interstate commerce, and cyberstalking.

Don Gathers, McMahon’s alleged target who is identified in the indictment only by his initials, had planned to formally announce his candidacy for city council on Jan. 8, 2019. But after McMahon allegedly threatened Gathers on social media on Jan. 7, Gathers instead announced he would not seek office.

Last year a group of anonymous anti-fascist activists published evidence that McMahon used the pseudonyms “Pale Horse” and “Jack Corbin” to spread hate online. Reporter Jared Holt at Right Wing Watch later verified that McMahon was in fact behind those accounts.