Swedish sources do state that the bitcoin came from selling drugs.
https://sverigesradio.se/artikel/domda-knarklangare-far-mang...
https://sverigesradio.se/artikel/domda-knarklangare-far-mang...
That seems to be an assertion the prosecutor made, but I see no facts to support that statement. Prosecutors say those sorts of things all the time in order to win cases.
Are you saying the prosecutor is correct or that the translation is false?