Loved it! I got 12 points :D I didn't mention that they worshipped the sun and it was the solstice, and I also misinterpreted the black marks to be tire screeches or something, hinting at a fourth person who maybe managed to leave in time and might still be in danger (the phone convo was also a hint, though I didn't pay attention at the names). Turns out it was shoe polish ahhah (I hope I would have not made the mistake that shoe polish is tire marks in real life).
First I was coy and thought I could solve it without even talking to them, but I actually backtracked after taking a look at the submit page with the dropdowns.
It's too bad this kind of story is hard to make replayable, because it was quite enjoyable and I could play some more :D Well done Victor!