- Available: Investigate dead end at tile (grid C5) in Group Date Cafe Stop 2
- Rewards: Ag-Lu Reverse (accessory), 2500 EXP
- Bonus: Antibiotic Gel (guessing the culprit on the first try)
You will get this request from the southeast corner of the room with the highest amount of moving tiles in Stop 2 of Group Date Cafe (not the one through the door that leads to a dead end). It seems that Chie placed some snacks near the beginning of the floor and someone has stolen them, with Naoto leading the investigation. As soon as you exit the Nurse's Office. According to her clues, there's only four people who could have committed the crime, which are Theo, Margaret, Marie and Elizabeth, as everyone else was inside of the labyrinth. As Naoto points out before conducting the interviews, the culprit will be lying in their testimony, so the big tip to do is flip them around as if they were lying, finding any contradictions. There's three important things to note:
- The culprit is acting alone.
- The culprit will lie.
- Everyone else will tell the truth.
Visit each facility to hear testimony from each of the culprits. Theo says he's not the culprit and that Elizabeth is the one behind it, while Elizabeth says that the thief is a member of her family. Marie says she's not the thief and she'd lie about it if she were, while Margaret says Marie does not appear to be lying and that she is not the culprit. Basically, if you flip all of their statements, Marie and Margaret would be contradicting one another, while Elizabeth's would pin it on Marie, which can't be true. That leaves only one other person, Theo, who's the thief, so visit the Workshop to bring an end to this request. You'll get a bonus item if you get the culprit without accusing any innocent people.