Solution: Der schmutzige Pausenhof

8×8 Murdoku case · Medium · murdokuonline.org

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

C1C2C3C4C5C6C7C8
R12ChDylan3ShCa
R2ChTTChTrElsa
R3ChTTChVitoTr
R4AlexChChMSh
R51CP+CC54CSBellaL
R6CCCGretaSCL
R7TFreyaTCSCL
R8ChCChCarol

Where everybody stood