Ajay Dhingra has been indicted on four counts of firearms violations, including possession of a machine gun, specifically a bump stock.
The indictment also alleges that Dhingra unlawfully possessed a firearm after having been committed to a mental institution.
According to the U.S. Attorney's office, Dhingra left a concerning message at the George Bush Foundation.
Law enforcement contacted Dhingra at his home where they found a rifle with an installed bump stock.
A search warrant was obtained and authorities found a Glock pistol, a Colt rifle with a bump stock and 277 rounds of 9mm ammunition.
If convicted of any of the charges, Dhingra faces up to 10 years in federal prison and a possible $250,000 fine on each count.