Solution: MicroMacro 2.5

5×5 Murdoku case · Medium · murdokuonline.org

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

C1C2C3C4C5
R13Ch+CC4Christian
R2T+CCDariuszTT
R31SApoC2
R4CCCBernd
R5VeronikaChChTT

Where everybody stood