NCIS investigating after major general is found dead at Twentynine Palms Marine base | 2 July 2024 | The Naval Criminal Investigative Service is probing the death of a military officer whose body was found at the Twentynine Palms Marine base, officials said. Maj. Gen. William F. Mullen was found dead at the Twentynine Palms base Saturday, according to San Bernardino County coroner's records. Mullen, at one time the commanding general of the base, retired in 2020. San Bernardino County sheriff's spokesperson Mara Rodriguez confirmed that NCIS is investigating the death at the facility, which is the world's largest Marine Corps training base. NCIS is the investigative law enforcement entity of the Department of the Navy.