Swedish authorities confirmed that Gottfrid Svartholm Warg, cofounder of The Pirate Bay, had arrived in Sweden on Tuesday morning, where he was promptly arrested by regional police (Länskriminalens) on suspicion of hacking a Swedish tech company and acquiring private tax data. Svartholm Warg was questioned by local authorities immediately upon his arrival, after having been deported, reportedly on an expired residency visa, from Cambodia on Monday.

"The preliminary investigation concerning hacking against the company Logica and Tax Board in the spring, made against a person of interest, Gottfrid Svartholm Warg, previously convicted in Sweden for copyright infringement," the Swedish International Public Prosecution Office wrote in a statement released to Swedish media.

In a conversation with Ars, Swedish authorities confirmed Svartholm Warg’s arrival in Sweden, and said that he has not yet been formally charged with a crime.

“The prosecutor has until Friday to indict him,” said Fredrik Berg, press officer at the Swedish Prosecution Authority. “The investigation is ongoing. He’s in detention now and is waiting for further investigation. This [arrest] has nothing to do with The Pirate Bay case. He was brought to Sweden to serve the time for the previous sentence [in connection to The Pirate Bay conviction], but the Swedish prosecutor has held him for another crime. I don’t think he will be sent to jail for the earlier conviction until this issue is resolved.”

Svartholm Warg, along with three others, was convicted of “assisting in making copyrighted content available.” Very little of the $6.5 million that they were collectively ordered to pay has been collected. Last year, Svartholm Warg’s order to serve one year in prison was finalized by the Swedish court as he failed to come to the appeals hearing in person. In February 2012, the Supreme Court of Sweden declined to hear an appeal of the case.

As of 9am Tuesday morning in Sweden, just hours after his return to his homeland, neither his attorney Ola Salomonsson nor his mother had been able to see him.

“If he has arrived here, he will have to contact me. That’s how it is,” Salomonsson told Ars.

Kristina Svartholm, reached at her home in the Swedish capital, said that she went early in the morning to the Arlanda airport outside Stockholm, but was not allowed to see her son.

“I tried over and over again, at least to be permitted to look at him at a distance—but no,” she told Ars.

Svartholm Warg, 27, who is also known online as “Anakata,” appears to be the third suspect in a case involving a hack of Logica, a Swedish IT firm that contracts with the Swedish tax authority. Earlier this year, Logica was hit by an online attack that resulted in around 9,000 Swedes (Google Translate) having their personal identity number and names released to the public.

Normally in Sweden, such data is made public, but there are cases where that data can be kept hidden—as it was amongst the people that were targeted. However there has been some speculation in the Swedish media if that data was genuine. Still, two Swedes were arrested (Google Translate) earlier in 2012 in connection with this case, one of which was a former member of Piratbyrån (Pirate Bureau), the group that later founded The Pirate Bay.