Daughter stabs mother — first murder of the year in Marin

UPDATE: The woman killed has been identified as Olivia Lucia Beltran Pacheco, the mother of the woman arrested. SRPD subsequently learned that the murder was live streamed on Facebook.

On Monday, Jan. 8, SRPD Officers and SRFD Paramedics rushed to a Terra Linda apartment complex on a report of a fight and possible stabbing in progress.  Upon arrival, a 55-year-old San Rafael woman was located with numerous stab wounds.  She died a short time later.  Tonantzyn Oris Beltran, a 28-year-old San Rafael resident who was still at the scene when police arrived, was arrested for the murder of the victim.

Just before 5 p.m., SRPD officers responded to Cresta Way in San Rafael to multiple reports of a physical fight and stabbing at an apartment in the complex.    When officers arrived, they were directed to an apartment’s rear balcony, where they saw Beltran on a balcony holding a knife in her hand, standing next to a stabbed female victim, and her clothes soaked in blood.  Beltran was not readily responsive to officers’ commands and directions.

While officers were confronting Beltran from the balcony, another team of officers forced entry through the front door of the apartment and immediately took Beltran into custody.  The San Rafael Fire Department, who was also at the scene, was able to render immediate emergency medical care and transported the victim to a local hospital.

Hospital staff made every effort to save the victim’s life but were unable to overcome the extensive life-threatening injuries. An hour and a half later, the victim was pronounced deceased.

This is an active investigation, and SRPD Detectives are working to determine what led to the murder and establish a motive for why Beltran would commit such an offense.  Beltran has been identified as the victim’s daughter.

SRPD is partnering with the Marin County Coroner’s Office for the homicide investigation.  The Marin County Coroner will release the victim’s name. 

Anyone with information about this incident is asked to call San Rafael Police at (415) 485-3000. Tips can also be made online at http://www.srpd.org/tips.