Clues & Culprits › Archive › Oct 11, 2026 Medium walkthrough
Oct 11, 2026 Full Proof Walkthrough
Every verdict in the Medium case “The Ambulance on Moorgate”, in an order where each step is proven by the statements already on file.
Play it first Just a hint, please
This Medium case seats 20 suspects on a 4×5 grid. 15 of them carry a clue; the other 5 only have something to say about themselves. 1 of the steps can only be proven by reading two or more clues together. The order below is one valid route; any order where each verdict is proven when you enter it reaches the same answer.
Spoiler: show the full walkthrough
Start: Greta (C2) begins the case proven a criminal.
None of the buskers in my column is a criminal.— Greta, accountant (C2)
Step 1: Cora (C1, busker) is innocent. This follows from Greta’s statement and the verdicts already proven.
Step 2: Kira (C3, busker) is innocent. This follows from Greta’s statement and the verdicts already proven.
Step 3: Mila (A4, busker) is innocent. This follows from Cora’s statement and the verdicts already proven.
None of us buskers is a criminal.— Cora, busker (C1)
Step 4: Ned (B4, courier) is innocent. This follows from Mila’s statement and the verdicts already proven.
The person between me and Otto is innocent.— Mila, busker (A4)
Step 5: Jasper (B3, locksmith) is a criminal. This follows from Ned’s statement and the verdicts already proven.
Otto and I have exactly one innocent neighbor in common.— Ned, courier (B4)
Step 6: Raj (B5, technician) is a criminal. This follows from Ned’s statement and the verdicts already proven.
Step 7: Suki (C5, accountant) is a criminal. This follows from Ned’s statement and the verdicts already proven.
Step 8: Otto (C4, locksmith) is innocent. This follows from Raj’s statement and the verdicts already proven.
Tess and I have exactly one criminal neighbor in common.— Raj, technician (B5)
Step 9: Lena (D3, technician) is innocent. This follows from Otto’s statement and the verdicts already proven.
Lena and I share the same verdict: both criminal or both innocent.— Otto, locksmith (C4)
Step 10: Petra (D4, courier) is innocent. This follows from Suki’s statement and the verdicts already proven.
Exactly one of my five neighbors is a criminal.— Suki, accountant (C5)
Step 11: Emil (A2, accountant) is a criminal. This follows from Petra’s statement and the verdicts already proven.
If Emil is innocent, then I'm a criminal.— Petra, courier (D4)
Step 12: Tess (D5, courier) is innocent. This follows from Suki’s statement and the verdicts already proven.
Step 13: Basil (B1, accountant) is innocent. This follows from Tess’s statement and the verdicts already proven.
Basil and Ned are either both criminals or both innocent.— Tess, courier (D5)
Step 14: Ada (A1, technician) is a criminal. This needs 2 statements together — Jasper’s and Emil’s. Assume the opposite verdict and at least one of them breaks.
Exactly three of my eight neighbors are criminals.— Jasper, locksmith (B3)
Exactly three of my five neighbors are criminals.— Emil, accountant (A2)
Step 15: Ivan (A3, locksmith) is innocent. This follows from Ada’s statement and the verdicts already proven.
There are exactly three innocents below me.— Ada, technician (A1)
Step 16: Freya (B2, locksmith) is a criminal. This follows from Jasper’s statement and the verdicts already proven.
Step 17: Hattie (D2, paramedic) is innocent. This follows from Kira’s statement and the verdicts already proven.
Exactly three of my eight neighbors are criminals.— Kira, busker (C3)
Step 18: Dina (D1, paramedic) is a criminal. This follows from Lena’s statement and the verdicts already proven.
There is exactly one innocent above me.— Lena, technician (D3)
Step 19: Quinn (A5, technician) is innocent. This follows from Basil’s statement and the verdicts already proven.
Exactly two of the four people in the corners are criminals.— Basil, accountant (B1)
The final lineup
| A | B | C | D | |
|---|---|---|---|---|
| 1 | Ada criminal | Basil innocent | Cora innocent | Dina criminal |
| 2 | Emil criminal | Freya criminal | Greta criminal | Hattie innocent |
| 3 | Ivan innocent | Jasper criminal | Kira innocent | Lena innocent |
| 4 | Mila innocent | Ned innocent | Otto innocent | Petra innocent |
| 5 | Quinn innocent | Raj criminal | Suki criminal | Tess innocent |
What happened
The collapsed man was a pile of blankets. Dina, a paramedic who ran the branch's first-aid training, borrowed the ambulance and its lights, and the flashing blue kept every passer-by at a respectful distance from the pavement hatch. Freya and Jasper, the bank's locksmiths, opened the boxes from a tunnel dug up out of an old sewer; Ada and Raj, the technicians, put the basement sensors into 'maintenance mode' for exactly six hours. Greta, Emil and Suki, the accountants, had chosen the forty boxes from the rental ledger: the forty whose owners never came back to visit.