Svartholm Warg was cleared last month of hacking into the Swedish bank Nordea by the court of appeal (hovrätt). He had his sentence cut in half but appealed to the highest court in the court after being slapped with a year behind bars for hacking into IT firm Logica, reported Computer Sweden.
Now the Supreme Court (Högsta domstolen) has turned down his appeal. Svartholm Warg has always maintained his innocence about the bank hacking charges saying that somebody else had used his computer remotely.
Last month the court of appeal sided with him saying it could't be ruled out that his computer may have been tampered with by a remote third party.
Svartholm Warg was previously convicted by the Nacka District Court in June after a hacking attack against Swedish IT firm Logica through which unauthorized access was gained to the personal data of thousands of people, which was then published online.
Logica supplies public agencies in Sweden with personal data from the country's population registry.
The rejection by the supreme court completes a miserable week for Svartholm Warg who is also set to face trial in Denmark on separate hacking charges. He penned an open letter to the Swedish government not to deport him to its close neighbour arguing that the Swedish and Danish cases are similar
"It must be investigated whether this act should be considered 'the same offence' or not [in Denmark]," said Warg.
If convicted, Svartholm Warg could face a six-year jail sentence. However, the extradition process is likely to take several months by which time he may have already completed his Swedish sentence.
In a separate development, film company Yellow Bird has demanded that Svartholm Warg should declare himself bankrupt as he hasn't been able to pay his debts since the 2009 Pirate Bay conviction
Since December, Svartholm Warg has been held in a prison in Mariefred in central Sweden.