Solution: The Guest List

9×9 Murdoku case · Hard · murdokuonline.org

Bella did it — the only suspect in the room with the victim, outlined in red below.

C1C2C3C4C5C6C7C8C9
R13GretaP56
R22PTTBellaPT
R3CTFreyaT+C
R4CCChChChCElsa
R5VidalTTT
R61TTvTCarolT
R7CHughTv
R8C4AnnaPC
R9DylanPCCC

Where everybody stood