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California Man Convicted of Killing Estranged Wife After Lying in Wait Inside Her Apartment

A California man, Zarbab Ali, 28, has been convicted of murdering his estranged wife, Rachel Castillo, 25, in a case that drew widespread attention across Ventura County and the state due to its disturbing circumstances and the young family left behind.

Ali, a resident of Hawthorne, Los Angeles, was found guilty of first-degree murder in Ventura County Superior Court. The conviction followed a lengthy investigation and court process that traced the final hours of Castillo, a dedicated mother of two, graduate student, and community service worker. Ali had previously entered a guilty plea to a felony charge involving the handling of human remains.

Events Leading Up to the Murder 

The incident occurred on November 10, 2022. Earlier that day, Ali had picked up the couple’s two young sons from Castillo’s Simi Valley apartment as part of a custody arrangement. According to prosecutors, he later returned to the apartment at night with a knife he had purchased days before, indicating premeditation. Evidence presented during trial confirmed that Ali entered the residence and waited for Castillo to emerge from her bedroom before attacking her.

When Castillo failed to respond to messages later that day, her family grew concerned. Her sister arrived at the apartment and discovered clear signs of distress and an apparent struggle. Authorities were notified immediately, prompting an intensive search that involved the Simi Valley Police Department, the Ventura County Sheriff’s Office, and the FBI.

Discovery and Arrest

Castillo’s body was located on November 13, 2022, in a remote desert area of Antelope Valley. Investigators traced Ali’s movements and apprehended him the same day in Victorville. During multiple interviews with detectives, Ali confessed to the killing and described the events leading up to his actions.

Court Proceedings and Motive

During trial testimony in November 2024, Ali acknowledged the killing and stated that he had been overwhelmed by jealousy, emotional conflict, and anger stemming from the couple’s separation nine months earlier. He claimed that learning Castillo had entered a new relationship intensified his feelings and led to irrational decisions.

The defense argued that Ali’s emotional instability and fears over custody contributed to his state of mind at the time. Prosecutors, however, emphasized the deliberate planning and the steps Ali took before and after the killing as clear indicators of premeditated murder.

Testimony revealed that Ali had held resentment toward Castillo, blaming her for what he considered personal setbacks, including difficulties with employment and parenting responsibilities. He admitted he had been contemplating harming her for several months.

Remembering Rachel Castillo

Castillo’s family and friends described her as a devoted mother, a high-achieving student, and a compassionate advocate for those in need. At the time of her death, she was enrolled in Pepperdine University’s graduate program, pursuing a degree in marriage and family therapy. She also worked with Interface Children and Family Services, where she helped connect vulnerable individuals with essential services.


Her aunt, Renee Redding, publicly defended her memory during the trial, rejecting attempts to portray her negatively. She noted that Castillo was a dedicated student and a loving mother whose children will grow up without her presence.

Family and Community Response

The verdict brought relief to Castillo’s family, who endured the emotional strain of the trial. Her father, Chris Castillo, expressed gratitude that justice had been served and that the case provided some measure of closure for loved ones.

Senior Deputy District Attorney David Russell stated that the conviction ensures public safety, noting that the severity of the crime and the evidence presented make it clear that Ali poses a danger to others.

Next Steps

Ali will return to court for sentencing on January 12, where he faces a mandatory life sentence. Prosecutors have indicated that the conviction ensures he will remain incarcerated for the rest of his life.

The case continues to serve as a somber reminder of the dangers posed by escalating domestic conflict and the lasting impact such tragedies have on families, children, and communities.

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