The detective said they weren't.
According to your online article.
She isn't reading comments on this forum, you messed up demagogue.
She certainly reads anything she can find about it online you argumentative stirrer.
And I'm mainly repeating what was written in Polish articles
Probably not the best way to go.
It's a tragic death which appears to be of natural causes. That is doubtless the worst thing to happen to the woman's mother in her life. It must be very hard for anyone to accept.
As mentioned here, the procedures around sudden deaths are rigorous. The Death Certificate contains the cause of death. If it appears in any way suspicious, the police have to act. Evidently it is not suspicious.
Bringing up online conspiracies about it on an internet forum just perpetuates the mother's pain.