On June 6, 2025, Valentin Martinez, 42, male, Hispanic/Latino, was found in the roadway in the Fontana area of San Bernardino County after being fatally shot. Deputies from the sheriff’s Fontana station were dispatched on a report of a man down in the street, and the victim was subsequently identified as Valentin Martinez, 42, male. His death was recorded the same day in Fontana.
Within days, investigators identified two people believed to be responsible for the killing and learned they had fled across state lines. According to public summaries of the case, 42-year-old Jonathan Raymon Mota and 34-year-old Karina Rivera-Valles, both from Fontana, were wanted in connection with the June 6 homicide of Valentin Martinez, 42, male.
U.S. Marshals asked Arizona authorities to assist in locating the pair, who were tracked to the Golden Valley area near Kingman. On June 9–10, a coordinated operation by the Mohave County Sheriff’s Office—assisted by state and local partners—ended with the two taken into custody without incident. Mota was booked on a felony warrant for homicide; Rivera-Valles was booked on a felony warrant for accessory to homicide, with both awaiting extradition proceedings back to California.
Publicly available memorial and incident listings corroborate the date, location, and nature of the killing of Valentin Martinez, 42, male, in Fontana, and note the arrests tied to the case. While officials have not publicly detailed a motive in the available notices, the arrest reports indicate that investigators treated the case as a targeted homicide rather than a random act, culminating in the capture of the two named suspects in Arizona.
