DOWNEY (CBSLA.com) — A service will be held Sunday for Downey Police Officer Ricardo Galvez.

The 29-year-old was shot and killed while sitting in his parked car near the Downey Police station earlier this month.

READ MORE: Comedian Louie Anderson Dies At 68 After Battle With Cancer

Two adults and a juvenile have been arrested and charged in connection with Galvez’s shooting death.

Police believe the suspects were trying to rob Galvez and were unaware that he was an officer.

READ MORE: Meat Loaf, Entertainer Known For 'I'd Do Anything For Love,' Countless Other Hits, Dies At 74

Galvez was also a Marine who served in Iraq and Afghanistan.

Sunday’s viewing and rosary service started at 5 p.m. at the Downey Civic Center.

MORE NEWS: State Route 18 To Reopen Tonight After Being Washed Out On Christmas Eve

A funeral for Galvez will be held Monday 9 a.m. at the Cathedral of Our Lady of the Angels in downtown Los Angeles.