.. but apparently the police haven't uncovered any evidence, and refuse to let him free because of fear of him tampering with evidence.
His trial is scheduled to september, so basically the danish police has nothing on him (or they would just get the trial over with), and use some bogus claim to keep him in custody.
So no, scandinavian countries aren't the worst, but they certainly aren't bright shining stars either.
As I understand it, the evidence is a chatlog and an encrypted container. The police have had a hard time proving that he was one of the people in the chat. The encrypted container, which the police somehow broke (wonder how they did that), had data from the Danish hack and private documents which doesn't look too good.
Also he avoided a sentence for hacking into Nordea in Sweden by claiming that his computer was remote controlled and they couldn't prove that it was not.
I'd say it looks fairly likely that he had something to do with these crimes. Also I wouldn't say they have no evidence just that they probably don't have enough to convict. The arguments for continuing to hold him are pretty thin. He already had unsupervised meetings with family and friends so holding him because they are afraid of evidence tampering seems questionable.