Millar was arrested on June 14, 2025, after he “brandished” a handgun while clashing with a few of the thousands of protesters who attended a peaceful "No Kings" rally in downtown Nashville, according to Metro Nashville police.

A federal grand jury in Nashville recently returned a superseding indictment against Elijah Millar, 20, adding two additional firearms charges, as well as two counts of receiving child porn and possession of art work that depicted children engaged in sex acts.

Those charges are on top of an initial count for possession of a Sig Sauer 9 mm pistol at a June 2025 "No Kings" protest in downtown Nashville. Millar had previously been diagnosed with a mental illness that made it illegal for him to have a firearm.