"They even openly admin they attempted to steal their work."
"They" did not admit that at all. The father acknowledged that his 9 year old daughter had attempted to download a track and failed. He purchased the track for his daughter the next day. :-
- downloading copyrighted material is not theft, in the same way that theft is not murder (different laws);
- the track was not downloaded, so no copyright infringement occurred;
- the age of criminal responsibility in Finland is 15. As the child is 9 years old, she could not be charged with any crime, even if her download had been successful;
- collective punishment is forbidden by the ECHR - the family cannot be punished for the action of one member.