Alex did it — the only suspect in the room with the victim, outlined in red below.
| C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | |
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | 4P | C | C | 2 | Carol | C | C | |||
| R2 | Grant | T | T | C | C | T | T | T | C | |
| R3 | T | T | C | C | C | C | Hana | |||
| R4 | P | C | Edison | 5 | L | |||||
| R5 | 3 | C | Dalia | C | G | G | L | |||
| R6 | T | T | Ivan | L | ||||||
| R7 | P | Freya | P | P | L | L | L | L | ||
| R8 | 1 | P | P | P | 6Alex | S | ||||
| R9 | Ca | Ca | Ca | Ca | Ca | Ca | Ca | S | Viola | S |
| R10 | P | P | Bernd | P | P | S | S | S |