The parents of Diego Rios filed a federal civil rights lawsuit on Sept. 16 against police corporal Benjamin Alba, officer Joshua Orona, the City of Claremont and 10 unnamed city employees. Alba and Orona killed Rios on Nov. 28, 2025, in a use-of-force incident during a traffic stop, as Rios was experiencing a mental health crisis.
The Los Angeles Department of Medical Examiner ruled the death a homicide in February 2026.
The family’s lawyer, Arnoldo Casillas, announced the lawsuit at a press conference in South Pasadena on Sept. 17. An audience of family, friends, and supporters, which included several students from the Claremont Colleges, showed up to hear from Casillas and the Rios family about the lawsuit.
“The coroner’s office determined that he died of, essentially, a heart attack, cardiovascular, and that it was temporal to their restraint,” Casillas said. “And the coroner’s office has determined that this was a homicide. This wasn’t an accident. This certainly, certainly wasn’t a suicide. This was homicide. The officers killed him.”
Words by Madeleine Farr and Claire Welch | Photo by Claire Welch
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