Santa Barbara Man Pleads Guilty to Courthouse Bombing

A man from Santa Barbara County admitted to bombing a courthouse in 2024 after law enforcement seized his firearms earlier that year. Nathaniel James McGuire, aged 22, pleaded guilty to using a weapon of mass destruction and malicious destruction of a building using an explosive, as confirmed by the U.S. Attorney’s Office in Los Angeles.

McGuire stated in his plea agreement that the bombing in Santa Maria, which injured three people and damaged the building, was a targeted attack on sheriff’s deputies. His sentencing hearing is set for March 1, and he faces a possible life sentence. McGuire’s attorney did not respond to inquiries for comments.

This defendant’s brazen act of terror resulted in physical, structural, and emotional harm, and could have had tragic consequences, said First Assistant United States Attorney Bill Essayli. Individuals who use bombs against law enforcement officials, judges, and other government personnel must be held accountable and face severe punishment for their actions.

McGuire admitted that on September 24, 2024, he threw a backpack with an explosive device past the courthouse security toward Santa Barbara sheriff’s deputies. The backpack slid between a person’s legs and detonated outside a courtroom.

Prosecutors reported that McGuire shouted “Liberty or death” while throwing the backpack. He was at the courthouse to face charges related to his arrest on July 28, when the sheriff’s deputies found him with an unregistered, loaded revolver.

After the bomb detonation, McGuire attempted to retrieve two long guns and 10 Molotov cocktails from his vehicle, planning to re-enter the courthouse to attack deputies and a judge. He was apprehended while trying to reach a red Ford Mustang parked nearby.

A witness recounted that the explosion created smoke inside the courthouse, and observed ammunition falling from McGuire’s pockets as he was detained. Shane Mellon, present for a court appearance, remarked on the severity of the situation, noting it could have been much worse.

The bombing caused approximately $35,000 in damage, forcing the courthouse to temporarily close. According to the plea agreement, McGuire retaliated against alleged governmental wrongdoings, including the firearm seizure earlier that year.

Law enforcement discovered bomb-making materials at McGuire’s home, as indicated in the plea agreement.

McGuire launched a vicious, terroristic assault on a court of law with the intent to kill law enforcement officers and a judge, stated Assistant Attorney General for National Security John A. Eisenberg. His attack injured three people and, were it not for the quick action of court security and law enforcement, it could have been far worse.

Times staff writer Salvador Hernandez contributed to this report.