A quick read-through seems to suggest that they have quite solid support for it. However, I haven't seen the investigation protocol (FUP) so I cannot say if the actual evidence is any good.
A bunch of documents not actually in the linked PDF.
The prosecutor claims that they have chats logs that show Gottfrid discussing the hacking, logs that connects IP address to those owned/bought by Gottfrid, data on a mobile phone owned by him, and computer + old hard drive.
Sadly, none of that is actually showed in the PDF. Only referenced.
A quick read-through seems to suggest that they have quite solid support for it. However, I haven't seen the investigation protocol (FUP) so I cannot say if the actual evidence is any good.