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Temple Station

Detectives To Ask For Public’s Help In Locating Missing Juvenile Who Is Also a Person Of Interest In Fatal Hit & Run, Rosemead 750 976 SIB Staff

Detectives To Ask For Public’s Help In Locating Missing Juvenile Who Is Also a Person Of Interest In Fatal Hit & Run, Rosemead

On Friday, November 12, 2021, Temple Station Detectives asked for the public’s assistance locating 16-year-old Mariano Coc, who was last seen at his residence in South El Monte on Sunday, November 7, 2021.  

Mariano is also the person of interest in a fatal hit and run incident that occurred in the City of Rosemead on Monday, November 8, 2021.

At approximately 10:30 AM, an altercation took place between two individuals on the 2700 block of San Gabriel Blvd, near the intersection of Garvey Ave in the City of Rosemead. That altercation resulted in the death of 61-year-old Riverside resident Haiou He.

Upon further investigation, it was determined that a possible traffic collision between two parties and had escalated into a verbal argument. At that time, the victim exited his vehicle to speak with the other vehicle’s driver. During the confrontation, the driver, who was still seated in his vehicle, placed it into reverse and subsequently ran over the male victim, causing life-threatening injuries. The victim, unfortunately, passed away from his injuries on Wednesday, November 10, 2021.

Immediately after the incident, the suspect, driving a 2009 black Nissan Altima with a grey bumper, fled the scene, driving northbound on San Gabriel Blvd and out of view. The vehicle used in the crime has since been located.

During the investigation, it was determined that the vehicle belonged to a local family, and the last person to be seen with the vehicle was 16-year-old Mariano Coc.

Mariano, along with the vehicle, were last seen on Sunday, November 8, 2021, between 5:00 AM and 7:00 am.

According to multiple witnesses at the scene, the driver’s description of the fatal hit and run does not match Mariano’s description.

At this time, Mariano is still missing, and Detectives are worried that he may have become the potential victim of a crime. 

Mariano was last seen wearing a tan tank top, light-colored jeans, and black slip-on sandals. He is 5’07”, 145 pounds, and has brown hair and brown eyes.

Sergeant Richard Lewis asked for public’s assistance, “If anyone happened to see a collision prior to this instance, or heard the altercation…we’re asking for the public’s help with this.”

Detective Karina Bravo provided remarks to the media in Spanish.

Detectives are asking for any assistance from anyone that may have been in the intersection at the time or witnessed the fatal hit and run incident, are encouraged to contact Temple Station Detectives.

If you have information, please contact the Temple Sheriff’s Station at (626) 292-3389.  If you prefer to provide information anonymously, call Crime Stoppers at (800) 222-TIPS (8477), use your smartphone by downloading the “P3 Tips” Mobile App on Google Play or the Apple App Store, or use the website

Portrait of Captain Mark Reyes in uniform, sitting infront of the American Flag



Mark Reyes has been selected by the area contract cities and Sheriff Alex Villanueva as the next Captain of Temple Sheriff Station (TEM), following the recent retirement of Captain David Flores.  This will be Reyes’ second tour at TEM, having previously been assigned there as a lieutenant.

Reyes began his time on the Department as an explorer at 16 years old.  He was also a community service officer and a custody assistant prior to becoming a deputy.  In 1995, he became a custody deputy at Century Regional Detention Facility in Lynwood.  He worked in patrol at Transit Services Bureau and Industry Station.  He was a field training officer and a member of a gang task force with the Community Oriented Policing Bureau before promoting to sergeant.

Reyes served five years as a sergeant, both in custody and in the field.  He also worked as an investigator at Internal Affairs Bureau.
When Reyes promoted to lieutenant, he transferred to North County Correctional Facility where he worked as a watch commander.  He then transferred to TEM, where he served as a watch commander and Detective Bureau lieutenant.  From there, he moved to Narcotics Bureau where he was assigned as the operations lieutenant.

Since 2019, Reyes has served as an executive aide for Central Patrol Division, the Assistant Sheriff of Patrol Operations, and lastly, for the Undersheriff’s Office.

This will be Reyes’ first assignment as a captain.  He grew up in the TEM area and is a graduate of Rosemead High School.  He has a bachelor’s degree in Criminal Justice from Union Institute & University and is fluent in reading, writing and speaking Spanish.  Reyes has two adult children; his daughter is a graduate of Azusa Pacific University and his son is a police officer for another local agency.  He enjoys traveling, golfing and spending time with his family and friends.  Reyes is also a recipient of the Department’s Meritorious Conduct Gold award for rescuing a pilot after an airplane crash.

Temple Station was established in 1926 and provides law enforcement services for the cities of Bradbury, Duarte, Rosemead, South El Monte, and Temple City, as well as the unincorporated areas of Arcadia, Monrovia, Pasadena and San Gabriel.  Reyes will be in charge of approximately 200 professional and sworn personnel who handle an average of 3,900 calls for service per month.