Mafia 12. Operation "New Year"

remnants of organic matter, including carbohydrates.

Hmm... maybe it's too simple, but DrNik and his love for chemistry immediately come to mind – guys, here's a tricky question: has he been gone for two days, or has he just not been responding?

The well-behaved snowmen grabbed Kash and dragged him to the investigators. Yes, Kash was reluctant to give, but he also didn't do any harm. He was placed in a warehouse with other pieces of evidence for further investigation.

I think Kash is the culprit, he just hasn't killed anyone yet.
Based on the clues:
A snow woman visited Areg, a baker visited Siver, and Vesker is probably just wandering around.

It seems that the events are taking a serious turn. This morning, Neira Drake was found near Wedm's house, turned into a pile of snowballs. We are all very sorry for the girl – she was so young and talented, and she hadn't yet had time to fulfill her dreams.

The only thing that might resemble a clue is:
young and talented / fulfill dreams, I'm leaning towards the second, maybe something is connected to dreams. As for the mold, maybe it's a coin, but the important thing is that it's not a coin, but specifically, something silver.