Episode 671: Detectives' Nocturne (The Case)
Scenario: Kogoro prepares to meet with the client Kei Katshitsuka. While waiting, he receives mail of Katshitsuka who changes their meeting location to a local restaurant. There, Kogoro realizes the cell phone address is different from the first message he received from the client. He, along with Tooru, Ran, and Conan return to the agency where they discover Katshitsuka tied up with her kidnapper dead. The police arrive and determine the kidnapper killed himself since no gunpowder was found on Katshitsuka. The four accompany Katshitsuka home; during the ride, Conan ponders on why the kidnapper's wallet was full of coins and small bills, his cellphone having only a history of one message and the lack of gunpowder on Katshitsuka.
While Kogoro and the group are watching a news report on a recent bank robbery, Amuro stops by with sandwiches from Café Poirot after finishing his part time job for the day. After commenting on the robbery, Amuro reveals that he wants the scoop on Kogoro's newest case request after deducing from Kogoro's appearance and habits that Kogoro had a case. Kogoro gets a text from the client requesting that Kogoro switch the meeting location to Café Columbo, and Amuro goes with them after changing out of his work clothes.
At Columbo, Kogoro explains to Amuro the request was to find the locker a key belongs to. The client fails to show, so Amuro, Kogoro, Conan, and Ran go back to the Mouri Detective Agency to make sure the client didn't actually turn up there instead. When Amuro arrives at the agency, he and Conan notice someone had broken in and appeared to have intercepted the client while they were out. Stepping outside, Amuro explains his deductions to the rest of the gang and that the culprit is hiding in the restroom. Before Amuro can open the bathroom door, a gunshot rings out, and Conan rushes in to find a dead man who apparently committed suicide with a gun and a taped-up crying woman.
When Conan and the group went inside, they found Kashituka who's been taped-up. They also found the dead man holding the gun. It seems he committed suicide.