Contra Costa DA’s investigation report clears cops in death of Brentwood woman following 2025 arrest

Becton says 72-year-old Yolanda Bustos Ramirez “died from a stroke and other health related issues” Oct. 3, 2025, while in the hospital and, “No further action will be taken in this case.”

Shares details about inquest jury’s split vote on findings

By Allen D. Payton

According to Contra Costa District Attorney’s Office PIO Ted Asregadoo, “The Contra Costa DA’s Office has released its full report on the investigation into the death of Yolanda Bustos Ramirez, following a thorough review of the circumstances surrounding her death. This release reflects our office’s commitment to transparency in matters that affect the community we serve.”

As previously reported, 72-year-old Yolanda Bustos Ramirez, died on Oct. 3, 2025, following her arrest during a family dispute. She was in the hospital and not in police custody at the time of her death. But her family is blaming police for causing her death and have filed a wrongful death lawsuit. A letter to the City from the family’s attorney claims she was “violently arrested by multiple Brentwood Police Officers.”

According to the Department, “On Friday, September 26, 2025, at around 11:00 a.m., Brentwood Police officers responded to a call involving a family dispute, during which Yolanda Ramirez, approximately 70 years old, was placed under a citizen’s arrest at the request of a family member. When officers arrived, Ms. Ramirez attempted to flee the scene. Officers detained Ms. Ramirez, and after being secured in a patrol vehicle, officers noticed she appeared to be having a medical issue, and they immediately contacted medical personnel. Ms. Ramirez was promptly released from police custody and transported by medical personnel to a local hospital.

“Several days later, the Police Department was notified that Ms. Ramirez was still hospitalized, her condition had worsened, and that she was not expected to survive. In accordance with Contra Costa County Law Enforcement Involved Fatal Incident Protocol, the Brentwood Police Department immediately notified the Contra Costa County District Attorney’s Office, and their agency initiated an independent investigation into the incident.”

In February, Brentwood Police released “a community briefing video consisting of in-car and body-worn camera footage, as well as 911 audio” of Ramirez’s arrest. They reported, “the family of Ms. Ramirez was provided with an opportunity to privately view the video prior to its release to the public.” (See related article)

Then, in July, a Contra Costa Sheriff-Coroner’s inquest jury found her death to be an accident. “The inquest presented the facts of the incident, including witness testimony, medical information, and body-worn camera footage, to a jury tasked with determining the manner of death: natural causes, accident, at the hands of another, or suicide,” Asregadoo shared. (See related article)

Investigation Report & Timeline

The investigation report includes audio and video footage of both police body cam, dash cam and a home surveillance camera, interviews with the involved police officers, Bustos Ramirez’s family members and a Con Fire paramedic, as well as medical records, autopsy report and the results of the Sheriff-Coroner’s Inquest Jury findings.

Asregadoo’s press release provided the following additional details:

Brentwood Dispatch Receives a Call

On September 26, 2025, at 10:37 a.m., a family member called Brentwood police to report a disturbance involving Ramirez, who was outside a residence banging on the front door and had broken a coffee mug on the porch. The family member, who is Ramirez’s sister, told dispatch that Ramirez had been confrontational in the past and that she feared Ramirez would become combative again.

Officers Aaron Peachman and Danielle Tjhia arrived at approximately 10:49 a.m. and found Ramirez standing in the driveway. The family member told Officer Peachman that a dispute arose over who was responsible for driving their brother to a medical appointment. When the family member took their brother back inside, Ramirez banged on the door and broke a coffee mug on the porch. The family member told officers she wanted to press charges for property damage.

Ramirez’s Arrest

As Officer Peachman explained the process of a citizen’s arrest, Ramirez attempted to leave the scene. Despite repeated commands to sit down and statements that she was not free to leave, Ramirez refused the officer’s directives. When officers took hold of her wrists and attempted to guide her away from her car, she said “stop” and continued to resist. Officer Peachman advised her she was under arrest and ordered her to place her hands behind her back. When she refused, officers moved her hands behind her back, handcuffed her, and escorted her to the patrol vehicle.

At the patrol car, Ramirez pulled away as officers attempted to search her pockets and repeated instructions to enter the patrol vehicle. Officers Peachman and Tjhia held Ramirez by the upper arms and walked her toward the open rear door. Approximately two to three feet from the door,

Ramirez dropped to her knees and struck the left side of her face against the vehicle’s interior, crying out in pain. She appeared alert afterward, with no visible injury. When she did not respond to further requests to stand and enter the car, officers lifted her to her feet and placed her across the back seat. As Officer Peachman guided her feet inside and closed the door, Ramirez pushed her leg against it. When he closed it firmly, Ramirez’s body shifted forward and the top of her head struck the closed door on the opposite side of the vehicle. She did not react audibly, nor were there visible signs of being hurt.

Medical Distress in the Patrol Vehicle

At approximately 11:04 a.m., Ramirez shifted to an upright position in the back seat and appeared alert. She repeatedly asked to be uncuffed, given water, and allowed to call family. After Officer Peachman stepped away at 11:14 a.m., her condition declined. As captured on the interior video camera in the patrol vehicle, her breathing grew slower and shallower, and her speech became incomplete and incoherent. When Officer David Smith checked on her at 11:18 a.m., she had difficulty understanding his questions, though she was able to state her name. After several more minutes of attempted interaction, officers called for medical assistance at 11:21 a.m. While medical responders were en route, Ramirez vomited in the vehicle.

Transport to Hospital and Death Days Later

Paramedics arrived at 11:29 a.m. and transported Ramirez first to Kaiser Permanente Antioch Medical Center and then to John Muir Health Walnut Creek Medical Center, where she was diagnosed with an intraparenchymal hemorrhage – which is bleeding in the right basal ganglia, deep inside the brain. She received medical treatment for several days before she died on October 3rd.

Autopsy Findings

On October 4th, 2025, Forensic Pathologist Dr. James Caruso conducted an autopsy of Ramirez and concluded that her death was caused by a cerebrovascular accident, or stroke, with hypertension, cardiovascular disease, diabetes mellitus, hyperlipidemia, and obesity as other significant preexisting conditions.

On October 26th, 2025, a second forensic pathologist, Dr. Matthias Okoye, conducted a private autopsy of Ramirez and concluded that her death was due to “multiple blunt force trauma and asphyxiation with complications all due to, and as a consequence of, police restraint.”

Additional Witness Account

On February 2nd, 2026, a resident who lived near the scene of the incident provided a statement to a Contra Costa County District Attorney’s Office inspector describing his observations of the arrest. The witness stated that he saw a male officer strike Ramirez three times in the back of the head with his elbow or forearm, driving her face into the closed rear passenger window as she stood next to the patrol vehicle. This account was incorporated into the investigation’s overall analysis, but a review of all witness statements and body-worn camera video capturing the entirety of the police contact with Ramirez found that the use of force described by the additional witness did not occur.

The officers “had the Legal Authority to detain/arrest Yolanda Ramirez” and “used objectively reasonable force” – Contra Costa DA Diana Becton

District Attorney’s Findings

The investigation report includes audio and video footage, interviews with the involved police officers, Bustos Ramirez’s family members and a Con Fire paramedic, as well as medical records, autopsy report and the results of the Sheriff-Coroner’s Inquest Jury findings.

DA Diana Becton’s Executive Summary provides more details about the results of the inquest jury writing, “The jury returned a split verdict on the case. Seven members of the jury determined that the cause of death was by ‘natural causes’, and eight members of the jury determined the cause of death was by ‘accident.’ None of the jurors concluded that the death was ‘at the hands of another’ or by ‘Suicide’.’”

Becton’s Executive Summary and Conclusion states, “In applying the law and the California District Attorney’s Uniform Crime Charging Standards to the present case, the CCCDAO finds the following:

1. As a matter of law, Officers Peachman and Tjhia had the Legal Authority to detain/arrest Yolanda RAMIREZ.
2. Officers Peachman and Tjhia used objectively reasonable force during the arrest of Yolanda RAMIREZ and there is no evidence that excess force was applied.
3. While incredibly tragic, Yolanda RAMIREZ died from a stroke and other health related issues, as opposed to police use of force.

“Based on the aforementioned findings, no further action will be taken in this case.”

Read the complete findings here: https://www.contracosta.ca.gov/DocumentCenter/View/92820/LEIFI-Final-Report-Yolanda-Bustos-Ramirez.