Solution: MicroMacro 1.5

5×5 Murdoku case · Easy · murdokuonline.org

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

C1C2C3C4C5
R13BellaC4Ch
R2T+COppiTT
R31SCC2Caroline
R4CCCDittbert
R5ChApoTT

Where everybody stood