A family is found murdered inside their own home in a sleepy part of town - what has happened?

Here is the letter mentioned in the episode loosely translated from Finnish :

Good evening!

We need help towing a car today in Peuramaa. A camper van, Mercedes Benz. I will arrive with my wife at half past eleven and we will wait for the tow truck there. We need to be towed to Malmi Veho.

Greetings,

Matti Paananen

Art is by Mark Pernia. You can email him at markprn@mail.com

Music is "Night" by VVSMUSIC

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