Antonia Herrera, 23, of Escondido, California, was found dead on January 12, 2017, on the side of Champagne Boulevard in unincorporated Escondido near Interstate 15. The San Diego County Sheriff’s Department ruled her death a homicide and later confirmed she died of gunshot wounds; autopsy details were sealed.

Investigators say Herrera had been riding back to San Marcos from Las Vegas with her boyfriend, two witnesses, and 27-year-old Paul Castro, an acquaintance. Authorities allege Castro became paranoid during the trip, produced a gun and shot Herrera three times; the boyfriend was grazed. After the shooting Castro allegedly ordered the driver to dump Herrera’s body and demanded to be taken back to Las Vegas. Castro was arrested in Las Vegas, extradited to San Diego and charged with murder and assault; he pleaded not guilty and was held on $3 million bail. Herrera’s family reported she had feared for her life in the months before her death and had taken out a life insurance policy.

Did anyone in the Las Vegas or San Marcos social circle know more about Herrera’s contacts with Castro or why she feared for her life?