[alexvr]

It's only illegal for him to say such a thing if he also has a few machine guns and other preparations ready to go. Such statements, even with the appended "jk lol," deserve question. But I don't see how authorities managed to do anything more than question or search him.

[xauronx]

Seems to me more like he needed a councilor and a talking to from his parents, but maybe the police did find the means to follow through with these statements in his home. This is all outrage-inducing non-information.

[zaroth]

The police did not find means to follow through with the statements. They did, however, confiscate his computer.