Ventura County District Attorney Erik Nasarenko announced that Christian Alexandre Hillairet a 25-year-old man from Ojai, has been charged with two counts of murder for the May 2025 killing of Carolyn Nino De Rivera and the 2023 death of William Thompson, a City of Ventura resident. Prosecutors have filed several special allegations against Hillairet, including commission of more than one murder, use of a deadly weapon, and a strike prior.
On May 31, 2025, Ventura County Sheriff’s Office deputies responded to a residence in the unincorporated area of Santa Paula following multiple reports of a possible homicide. Upon arrival, deputies discovered a deceased woman inside the home and determined she was the victim of a homicide.
Sheriff’s Office detectives quickly identified Christian Hillairet as a person of interest in the case. On June 1, 2025, they learned he had crossed into Mexico through the San Ysidro border. With help from federal agencies, he was found and arrested the next day in Rosarito, Baja California. On June 4, 2025, Ventura County detectives and a U.S. Customs and Border Protection agent met Mexican authorities at the San Ysidro border, where Hillairet was transferred to the custody of the U.S. Marshals Service and then to Ventura County authorities.
During the investigation, detectives with the Sheriff’s Office and the Ventura Police Department obtained information that linked Hillairet to a second alleged murder involving the death of William Thompson, in the City of Ventura on November 3, 2023. Thompson was allegedly bludgeoned to death with a weapon.
“The defendant’s alleged actions reflect a chilling pattern of violence and cruelty,” District Attorney Nasarenko said. “Our office is committed to securing justice for these victims and prosecuting Hillairet to the fullest extent of the law.”
Senior Deputy District Attorney Theresa Pollara, a member of the Ventura County District Attorney’s Office Major Crimes Homicide Unit, is prosecuting the case.