So how do you know this forbidden information that you made up?
He doesn't.
It's complete and utter nonsense, like claiming that the family is forbidden to talk about the victim's death. Poland is not North Korea, nobody has the right or power order such silence from the family. If the woman really died, nothing would stop the family from talking about it, it would be all over the social media first and then the traditional ones shortly after. At the moment we know that Klaudia K. is still in critical condition, the rapist was caught very quickly and faces life in prison...
bydgoszcz.tvp.pl/87235246/torun-atak-wenezuelczyka-na-mloda-kobiete-w-toruniu-proba-zabojstwa
... anything else is just cheap sensation seeking and fake news spreading--frankly, disgusting.