Solution: The Last Tenant

9×9 Murdoku case · Hard · murdokuonline.org

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

C1C2C3C4C5C6C7C8C9
R14TTTGrant
R26PCCAlexCBB
R3TT3DaliaP
R4PChBellaPChChP
R5HanaCCChTv
R62T5CB1Viola
R7CChFreyaBP
R8TTvCyrusC
R9EdisonTTT

Where everybody stood