This page of the Lost Judgment guide provides a walkthrough of the Side Case called Dastardly Detective: Introduction.
- 50,000 Y,
- 2000 SP.
Description of the case
The Dastardly Detective: Introduction Side Case is required to progress in the game's main storyline. In Chapter 4 (Red Knife), Tsukumo will give you a new gadget, the Detector.
You'll have to use it to find the source of the signal, located in a car on the parking lot, to the right of the building. After a short cutscene, the case will be completed.