A three-count federal grand jury indictment was returned today charging Nathaniel James McGuire, 20, of Santa Maria, California, with committing a bomb attack at a courthouse in Santa Maria in which several people were injured. McGuire’s arraignment is scheduled for Oct. 25 in the Central District of California.

According to the indictment and criminal complaint, on Sept. 25, McGuire entered a courthouse of Santa Barbara County Superior Court and threw a bag into the lobby. The bag exploded and McGuire left the courthouse on foot. The explosion injured at least five people who were near the bomb when it exploded.

Shortly thereafter, McGuire was apprehended and detained by law enforcement officials as he was trying to access a red Ford Mustang car parked outside the building. McGuire allegedly yelled that the government had taken his guns and that everyone needed to fight, rise up, and rebel.

Inside the car, a deputy saw ammunition, a flare gun, and a box of fireworks. A search of the car revealed a shotgun, a rifle, more ammunition, a suspected bomb, and 10 Molotov cocktails. Law enforcement later rendered the bomb safe. McGuire told law enforcement he intended to re-enter the courthouse with the firearms in order to kill a judge.

A search of McGuire’s residence revealed an empty can with nails glued to the outside, a duffel bag containing matches, black powder, used and unused fireworks, and papers that appeared to be recipes for explosive material.

McGuire was charged with one count of using a weapon of mass destruction, one count of maliciously damaging a building by means of explosive, and one count of possessing unregistered destructive devices. McGuire has been in custody since his arrest in September, shortly after the attack.

If convicted of all charges, McGuire faces a mandatory minimum penalty of seven years in prison and a statutory maximum penalty of life in prison. A federal district court judge will determine any sentence after considering the U.S. Sentencing Guidelines and other statutory factors.

Assistant Attorney General Matthew G. Olsen of the Justice Department’s National Security Division, U.S. Attorney Martin Estrada for the Central District of California, and Executive Assistant Director Robert Wells of the FBI’s National Security Branch announced the case.

The FBI is investigating the case.

Assistant U.S. Attorneys Mark Takla and Kathrynne N. Seiden for the Central District of California are prosecuting this case with substantial assistance from Trial Attorney Patrick Cashman of the National Security Division's Counterterrorism Section.

An indictment is merely an allegation. All defendants are presumed innocent until proven guilty beyond a reasonable doubt in a court of law.