Mexican National Admits Murdering Couple and their Unborn Child During Drug Trafficking Conspiracy

SAN DIEGO – Benjamin Madrigal-Birrueta, an undocumented Mexican national living in Yakima, Washington, admitted in federal court today that he murdered a man and his six-months-pregnant wife while they were engaged in a drug trafficking conspiracy.

According to his plea agreement, Madrigal-Birrueta and coconspirators fatally shot 44-year-old Cesar Murillo multiple times in the back of the head and the torso on August 28, 2022, during an argument. The shooting took place at a remote ranch outside of Yakima. Madrigal-Birrueta’s co-conspirators then buried the victim’s body near the ranch at Madrigal’s direction.

On September 2, 2022, Madrigal-Birrueta persuaded Murillo’s wife, Maira Hernandez, 33, who was unaware of her husband’s death, to come to the ranch by claiming her husband was waiting for her there. She agreed, and the defendant picked up Hernandez in Yakima and drove her to the ranch.

According to admissions in his plea agreement, when the visibly-pregnant Hernandez arrived at the ranch, the defendant’s coconspirators shot her multiple times in the head. Madrigal-Birrueta and his coconspirators then buried Hernandez near the ranch. The child died in utero when Hernandez was shot, killed and buried.

Madrigal-Birrueta admitted the murders were committed while he was engaged in a drug trafficking conspiracy. The plea agreement said Madrigal-Birrueta’s coconspirators owed money to the couple for an unpaid drug debt.

Madrigal-Birrueta is scheduled to be sentenced on March 27, 2026.

The superseding indictment also charges Ricardo Orizaba-Zendejas with being an accessory after the fact to murder and a co-conspirator in Madrigal’s drug trafficking organization. Orizaba-Zendejas is set for trial beginning October 27, 2025

According to court filings, the investigation originated with the seizure of drugs from vehicles entering the United States through San Diego area ports of entry between August and October of 2021. By August of 2022, the investigation led agents to a group of individuals operating out of Yakima. Special Agents with Homeland Security Investigations (HSI) interviewed Murillo and Hernandez. Within days of those interviews, Murillo and Hernandez were murdered and their bodies buried at the Yakima ranch in the high desert. Court filings describe how these charges followed an exhaustive, years’ long investigation that employed geophysicists, ground penetrating radar, aircraft, laser imaging, chemical testing of the soil, numerous cadaver dogs, and other law enforcement techniques to search for the victims’ remains. HSI Special Agents successfully recovered the remains on September 13, 2023, aided by a Washington State Police Crime Scene Investigations team.

During the investigation agents seized methamphetamine, cocaine, fentanyl, multiple firearms — including a machine gun — and body armor from Madrigal-Birrueta’s drug trafficking organization, to include the Yakima ranch.

This case is being prosecuted by Assistant U.S. Attorneys Stephen Wong, Alexandra Foster, Mario Peia and Brandon Kimura.

DEFENDANTS                                   Case Number 23cr1684-RBM                                    

Benjamin Madrigal-Birrueta                  Age: 22                        Yakima, WA

SUMMARY OF CHARGES

Count 4: Murder of Cesar Murillo in Furtherance of a Drug Trafficking Conspiracy – Title 21, United States Code, Section 848(e)

Maximum penalty: Mandatory minimum sentence of twenty years and up to life, or death

Count 5: Murder of Maira Hernandez in Furtherance of a Drug Trafficking Conspiracy – Title 21, United States Code, Section 848(e)

Maximum penalty: Mandatory minimum twenty years and up to life, or death

Count 9: Causing the Death of a Child in Utero – Title 18, United States Code, Sections 1841 and 1111.

Maximum penalty: Mandatory minimum life in prison or death

INVESTIGATING AGENCIES

Homeland Security Investigations

Drug Enforcement Administration

Federal Bureau of Investigation

Bureau of Alcohol, Tobacco, Firearms and Explosives

Washington State Police

California Highway Patrol

Yakima Police Department

Tulare County Sheriff’s Office

Visalia Police Department

Fresno Sheriff’s Office

Fresno Police Department

*The charges and allegations contained in an indictment or complaint are merely accusations, and the defendants are considered innocent unless and until proven guilty.