Service for Los Angeles officer gunned down while off duty

Mourners are expected to pack a Los Angeles cathedral to memorialize a young police officer gunned down while off duty at a taco stand last month.

The service this morning at the Cathedral of Our Lady of the Angels will honor Officer Juan Diaz. Los Angeles Archbishop Jose Gomez will preside over the bilingual Mass.

The 24-year-old officer was shot July 27 after he confronted a gang member spray-painting graffiti in the Lincoln Heights neighborhood.

Two men and a woman were arrested Aug. 2 in connection with the killing. Police say the gunman is affiliated with the Avenues street gang.

Diaz had been on the force for two years and was assigned to the police department's Professional Standards Bureau.