January 30, 2025
Dublin, CA – Today, Chief Assistant District Attorney Royl Roberts announced that a jury found Oscar Arevalo-Baquiax (24) guilty of second-degree murder for the death of Rigoberto Perez (49). Mr. Arevalo-Baquiax was also found guilty of second-degree murder for the death of Rigoberto Perez Jr. (22).
The testimony and evidence presented at trial showed that on or about September 24, 2022, Mr. Arevalo-Baquiax and a female friend were attending a birthday party at Mr. Perez’s apartment in Hayward. Witness testimony stated that at about 4:00 AM, a heated argument began between Mr. Arevalo-Baquiax and Mr. Perez Jr. about the female guest Mr. Arevalo-Baquiax brought to the party, and they were both asked to leave. The incident prompted a physical fight between Mr. Perez and his son. The jury also heard evidence that 15 to 30 minutes after leaving the party, Mr. Arevalo-Baquiax reentered the apartment, grabbed a knife from the kitchen, entered the bedroom where Mr. Perez, Jr., and Mr. Perez, Sr. were still fighting, and without provocation, Mr. Arevalo-Baquiax fatally stabbed both men. Testimony further established that with his hands covered in blood, Mr. Arevalo Baquiax admitted to his female friend that he had just stabbed both father and son.
“I want to thank the jury for their service and careful deliberation in this trial,” said Chief Assistant District Attorney Royl Roberts. “I also want to congratulate the prosecution team: Deputy District Attorney Mark Bennett and Inspector Irabe Taylor for securing the conviction, and District Attorney Victim Advocate Monica Torres for her support of the witnesses in this case.
Oscar Arevalo-Baquiax faces 32 years to life in state prison. He is scheduled to be sentenced on April 24, 2025, in Department 708, at the East County Hall of Justice in Dublin.
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Contact: damedia@acgov.org
The Alameda County District Attorney’s Office (DAO) is one of California’s largest prosecutors’ offices and is led by Alameda County’s first Black woman District Attorney Pamela Y. Price. Price brings her vision to this office to fairly administer justice in the pursuit of thriving, healthy, and safe communities for every person who steps foot in Alameda County, no matter their race, gender, religion, sexual orientation, income, or zip code. Price has been recognized as one of the most progressive prosecutors through her forward-thinking, innovative strategies to interrupt cycles of violence and crime and bring change to a criminal justice system rooted in systemic racism. Follow Madam DA on Instagram, Twitter, and Facebook, and @AlamedaCountyda on Twitter, Instagram, and Facebook.