Alex did it — the only suspect in the room with the victim, outlined in red below.
| C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | |
|---|---|---|---|---|---|---|---|---|
| R1 | 3B | Viola | H | 1Ca | Th | Ca | 6S | |
| R2 | Alex | Ch | C | Ch | ||||
| R3 | 2Carol | W | T | C | T | S | S | |
| R4 | Su | Su | T | C | T | F | Elsa | |
| R5 | Grant | |||||||
| R6 | W | 4 | Tr | P | 5H | Dalia | ||
| R7 | Tr | P | P | P | Floyd | H | Ho | |
| R8 | P | Cr | Bernd | Tr | Ho |