On Halloween, there were some cases in Austria in which candy laced with needles and nails was found.

I couldn't help but ask myself: what sick fuck does this?

Now it looks like there is another sick twist:

"According to current findings, children tampered with the candy themselves. In three cases, the minors acted to scare their own parents. In the fourth case, a so-called online challenge served as the trigger, with the explicit goal of deliberately misleading investigators."

Source (in German): https://www.salzburg24.at/news/oesterreich/halloween-suessigkeiten-manipuliert-polizei-ueberfuehrt-kinder-art-343591