Pomona police officer mourned

Pomona Chief of Police Mike Oliveri, right, offers his condolences to Greggory Casillas Sr., father of fallen Pomona Police Officer Greggory Casillas, at the end of a vigil.

A family member, in baseball cap, receives a hug of support at a vigil for fallen Pomona Police Officer Greggory Casillas.

Pomona Chief of Police Mike Oliveri, right, and Pomona Police Sgt. Art Catanese pray with others at a vigil for fallen Pomona Police Officer Greggory Casillas.

Greggory Casillas Sr., father of fallen Pomona Police Officer Greggory Casillas, mourns his son’s death during a vigil in his honor.

Family members of fallen Pomona Police Officer Greggory Casillas sit in the front row during a vigil at the Pomona Police Department pn Sunday evening.

Officers with the Pomona Police Department stand in line at a vigil for fallen colleague Greggory Casillas.

People attend a vigil for fallen Pomona Police Officer Greggory Casillas at the city’s Police Department headquarters Sunday evening.

Carrying flowers, Claudia Guzman, the wife of fallen Pomona Police Officer Greggory Casillas, walks with her brother Jose Guzman, second from right, before a vigil for Casillas.

A woman leaves flowers in memory of fallen Pomona Police Officer Greggory Casillas in front of police headquarters.

Carlota Cruz, 72, of Pomona holds a sign at a vigil for fallen Pomona Police Officer Greggory Casillas at the Pomona Police Department on Sunday evening.