After the Arrest: Booking
When someone is arrested, they're taken to the jail in the county where the arrest happened — usually the county sheriff's detention facility. Before anything else can happen, they go through booking: the intake process where the jail records who they are and why they're being held.
Booking may include fingerprints, a photograph, a warrant check, and an inventory of personal property and charges. The facility controls this process, and timing varies. While booking is underway, gather the person's legal name, date of birth, facility, and any booking or case number available.