Confirm Who Made the Arrest and Where the Person Is Now
The city where an arrest occurs, the arresting agency, the booking location, and the current holding facility can all be different. Someone arrested in unincorporated East Los Angeles may be booked by LASD and held at a county facility. Someone arrested in the City of Commerce may be held at a Commerce facility before transfer. Do not assume the person is currently at the East LA Sheriff's Station simply because the arrest happened in the station's patrol area. Confirm the arresting agency and current custody location before taking any other step.
What to ask
Which agency made the arrest? Where is the person being held right now? Has booking been completed?