Well, justice takes time and this is a complex novel case. I would rather have a system that is right than prematurely put innocent behind bars. However, if the allegations turn out to be true, which seems to have a decent probability, they could charge them with a criminal offence.

There is Article 254a in the Polish Penal Code. If you obstruct critical elements of infrastructure such as trains, you can face between 6 months to 8 years in prison.