Attack on Titan OVA (2013) - Episode 7 - Wall Sina, Goodbye: Part Two [English Subbed]

Summary :- After finding Kemper Boltz' body, Annie decides to cover up his murder and locate Carly Stratmann to prevent the case from interfering with her mission. As she takes the carriage back to Elliot G. Stratmann's house, she is kidnapped by two private investigators, Wald and Lou, who were hired by Elliot to find Carly but have now gone rogue and are trying to blackmail him. They reveal their plan to kill her and dispose of her body in the industrial area of Stohess, but on the way Annie breaks free by generating a Female Titan's arm and exploding the carriage.

Annie questions the injured Wald about Carly's whereabouts, but both are shot and left for dead by Lou. Wald survives long enough to tell Annie the location, and Annie storms the place and releases Carly. They speak and Carly reveals to be the producer of coderoin, with her father being the leader of the trade and Kemper a dealer. She had decided to stop the production and leave with Kemper, but he had betrayed her and kidnapped for ransom; later involving Wald and Lou. Annie helps Carly enter Wall Rose with a forged permit, and later meets with Elliot, telling him about Carly's escape, her knowledge of the coderoin trading, and that Elliot was the one who killed Kemper. Both dispose of Kemper's body in the industrial waste area, and Annie returns to the Military Police Regiment barracks, filing a false report about the case and determined to complete her current mission.