A Photograph of Defendant ("Mug Shots") is a type of portrait photograph taken by law enforcement during the booking process for a suspect that has been arrested. Mug shots are usually taken from the front and side views, and are used to document the physical characteristics of the individual for identification and record keeping purposes. There are two distinct types of mug shots: the standard portrait mug shot, and the ‘mug shot lineup’. The standard mug shot is a single portrait photograph of a suspect taken from the front and side views, with a neutral expression. The mug shot lineup is a series of photographs of a suspect taken from different angles and distances, and with different expressions. This helps to enable law enforcement to positively identify a suspect in an investigation.