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SBSD - Rancho Cucamonga Police Department
Tuesday July 20th, 2021 :: 09:50 a.m. PDT


On July 10th, a fatal traffic collision occurred at Milliken Avenue and Base Line Road

DATE/TIME:               July 10, 2021/ 5:13 PM                                  
INCIDENT:                 Fatal Traffic Collision  
LOCATION:                Milliken Avenue / Base Line Road, Rancho Cucamonga     
Victim:                         Mia Johnson 50-year-old female from Rancho Cucamonga
Suspect:                      Moises Reina 32-year-old male from San Bernardino
On July 10, 2021, at 5:13 PM, deputies from the Rancho Cucamonga Station responded to a five-vehicle traffic collision near the intersection of Milliken Avenue and Base Line Road in the City of Rancho Cucamonga. 
The suspect's vehicle collided with three other vehicles. The victim’s vehicle was pushed into the intersection, where it was struck by an eastbound vehicle. The suspect’s vehicle overturned and came to rest in the intersection, and the driver, identified as Moises Reina, was later transported to the hospital with non-life-threatening injuries.
The driver and passenger of the victim’s vehicle were both transported to the hospital. The passenger, Mia Johnson, later succumbed to her injuries at the hospital. The driver had serious injuries.
Deputies M. Magdaleno and J. Dean from the San Bernardino County Sheriff’s Department’s Major Accident Investigation Team (MAIT) responded to the scene to conduct the traffic accident investigation. The cause of the collision is under investigation. At the conclusion of the initial investigation, Reina was arrested and booked at West Valley Detention Center.
On Tuesday, July 13, 2021, the San Bernardino County District Attorney’s Office filed one count of PC 191.5(a) Gross Vehicular Manslaughter while Intoxicated, one count of PC187 Second Degree Murder (Watson Murder), and one count of CVC 23153(a) DUI Causing Injury. Reina is being held on $1,000,000 bail.
Anyone with information regarding this incident is urged to contact the Rancho Cucamonga Station at (909) 477-2800.  Callers wishing to remain anonymous may contact the We-Tip Hotline at 1-800-78CRIME (27463), or you may leave information on the We-Tip website at
Refer:              Deputies M. Magdaleno and J. Dean
Station:            Rancho Cucamonga Station                         
Case #:            112107687                 
Phone No.       909-477-2800 
Shannon Dicus, Sheriff-Coroner
San Bernardino County Sheriff-Coroner Department

SBSD - Rancho Cucamonga Police Department
10510 Civic Center Dr
Rancho Cucamonga, CA 91730

Emergency: 9-1-1
Non-emergencies: 909-477-2800

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