Мафия 3. Nightdreams Castle

I'm not a mobster; the clue is too obvious. The killer probably planted something similar because the GM wouldn't eliminate me so easily. Although, of course, the only clue is unsettling, but maybe it's a hint about moldy cheese... do we have any foodies here?

P.S. Additional alibi: I had guests yesterday, and I only went online in the morning. After the guests left, I watched anime and went to bed.