A 3-month-old child is at the center of an active Amber Alert spanning four California counties, including the Central Valley, after failing to be returned under a court-ordered custody agreement.
Maxence Sirois was last seen Sunday at 1 p.m. near McBride Lane and Underwood Avenue in Hayward, but the California Highway Patrol wasn’t notified until Tuesday—a crucial delay that’s now complicating the search. According to the Hayward Police Department, Sirois is believed to be with his mother, 42-year-old Marina Kazakova, who violated a custody arrangement by not returning the infant to his father on June 30. Kazakova is described as 5 feet 6 inches tall, 128 pounds, with brown hair and brown eyes, and was last seen wearing a black shirt and blue jeans.
The vehicle connected to the case is a 2016 white Mazda CX-5 with license plate 7SJW989. The last confirmed sighting placed it in Kern County, though officials believe Kazakova and Sirois could now be in Alameda, San Joaquin, Kern, or Los Angeles counties. The 2-foot-tall infant, who weighs 16 pounds and is bald with blue eyes, remains the focus of an urgent search effort.
Authorities are urging anyone with information to call Hayward police at 510-293-7000 and reference report number 2026-035385. If you spot Kazakova, Sirois, or the vehicle, call 911 immediately—but do not approach the mother. This case underscores how quickly custody disputes can escalate into critical situations and the importance of timely reporting to law enforcement. Every minute counts when an infant’s welfare is on the line.
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Andrew Johnson
Andrew Johnson is a contributor to LocalBeat, covering local news and community stories.
