Sgt. Maj. Gerardo Trevino poses for a group photo during a volunteer appreciation event at Marine Corps Recruit Depot San Diego, Calif., on April 30, 2024. Trevino was arrested Sept. 11, 2024, by Naval Criminal Investigative Services and is being held in pre-trial confinement. He was relieved Sept. 12, 2024, of his command at the recruiting depot. (U.S. Marine Corps)

A senior enlisted Marine was arrested by the Naval Criminal Investigative Service and fired from a West Coast training command, Navy officials confirmed Monday.

Sgt. Maj. Gerardo Trevino of the 3rd Recruit Training Battalion at the Marine Corps Recruit Depot in San Diego was arrested Wednesday by the Naval Criminal Investigative Service. The 38-year-old senior enlisted Marine is being held in pre-trial confinement while NCIS conducts “a thorough investigation,” said Darwin Lam, a NCIS spokesperson.

“Out of respect for the investigative process, NCIS will not comment further while the investigation remains ongoing,” said Lam, who did not reveal the charges facing Trevino.

Trevino was relieved of his command at the West Coast boot camp Thursday due to a “loss in trust and confidence,” according to Capt. Austin Gallegos, spokesperson for the recruiting depot. Trevino was relieved by Col. Peter Rummler, commanding officer of the Recruit Training Regiment.

“We will remain transparent on these issues but mindful of not to interfere with administrative or legal processes,” Gallegos said.

The U.S. military routinely cites only a vague “loss of confidence” when removing leaders from authority positions.

Trevino’s biography page on the Marine Corps Recruit Depot website had been removed by Monday.

Trevino, a native of McAllen, Texas, graduated from boot camp in December 2004. His decorations include the Meritorious Service Medal, Navy Commendation Medal in lieu of second award, Navy and Marine Corps Achievement Medal in lieu of fourth award, and the Military Outstanding Volunteer Service Medal.