Commander Robert Hicks refers to an Assistant District Attorney Kemper. However, the correct title in the Los Angeles County District Attorney's office is "deputy district attorney". "Assistant district attorney" is used in New York.
Per the dialog, the episode takes place a month after the SHOT (Shooting, Hunting, Outdoor Trade) Show, but the trade show takes place in January, not October.
Coachella isn't held at the Salton Sea but in Indio. The Salton Sea is in Riverside and Imperial Counties not Los Angeles County.