Monica Hernandez-Guillen was 18 when she was shot and killed on December 28, 2021, near Jackrabbit Trail and Yuma Road in Buckeye, Arizona. Officers responding at about 1 a.m. found her deceased from a gunshot wound; she was about four months pregnant.

Investigation focused on her 24-year-old boyfriend, Johari Baker, who was taken into custody later the same day. Court records say Baker told investigators they had been arguing while he drove, that Monica grabbed the steering wheel and caused him to pull over, and that a struggle over his firearm followed during which the weapon discharged and struck her. Deputies found a vehicle at the scene with the driver’s side door ajar and a firearm on the seat. Baker was arrested and charged with second-degree murder and domestic violence; bond was set at $500,000.

Family and friends described Monica as a bright, caring student at Northern Arizona University who hoped to become a counselor. Does anyone have information about Monica, her plans in Arizona, or the events that night?