L.A. Noire: "A Slip of the Tongue" Traffic Desk Case
Description
During the game L.A. Noire, officer, and later detective, Cole Phelps get assigned to various different areas of investigation. Those areas are split into different case types... murder cases, traffic cases, and such. A Slip of the Tongue DLC will appear in the traffic case section.
After Cole Phelps and his partner Bekowsky have pursued and arrested a suspect of stealing a car, the suspect declares his innocence of stealing said car. When the person can show his pink slip and bill of purchase as proof of ownership, you'll start your investigation at an auto dealership. After investigations and clues, the case will yield further investigations into falsification of papers and large scale car theft fraud.
This DLC was previously only available for pre-orders made at certain retailers. The pre-order bonuses became available to all game owners on May 31, 2011.

