Investigation 01 / 15–30 min
Merchant under pressure.
Three patterns in one window. Decide which one needs your attention.
Open the file ↗The evidence is open.
The decision is yours.
Short decisions for a first encounter. Case files to explore in your own order. Deep investigations for a full analytical workflow.
Investigation 02 / 15–30 min
The unexplained ten.
The dashboard difference shrinks. It does not disappear.
Open the file ↗
Investigation 03 / 15–30 min
The session that changed.
A new device is common. The sequence deserves a closer look.
Open the file ↗All records are fictional. These are learning exercises, not a live fraud console or competence certification. Your decisions remain in your browser.