REYKJAVIK, Iceland — It has been more than four months since thieves pulled off the biggest heist in the history of Iceland, and the police here still have no idea where the booty — roughly $2 million worth of Bitcoin-mining computers — is stashed. 
 
 A breakthrough in the case seemed imminent in early February when the authorities detained Sindri Stefansson, a 31-year-old man with a rap sheet that includes drug possession and burglary. Even though he hadn’t been charged, let alone convicted, the media tagged him the “mastermind” of the crime, largely because he was held in prison longer than any of the 11 suspects who were questioned. 
 
 Then, like the computers, Mr. Stefansson disappeared. For the next five days he was an international fugitive. After escaping from the prison — a feat that took surprisingly little effort, given the institution’s bare-minimum approach to security — he hopped a taxi to the country’s largest airport, where he boarded an early-morning flight to Stockholm. In a twist that seems borrowed from a cheesy caper film, the plane also carried Katrin Jakobsdottir, the prime minister of Iceland. 
 
 “We did not chat,” Mr. Stefansson said, calling from a prison near Amsterdam in his first interview since he was arrested two weeks ago in the Netherlands. Speaking by phone in a gloomy monotone, he said he had worn a baseball cap and avoided the gaze of everyone on the plane. “I kept my head down as much as I could.” 

 Iceland’s best known prison escapee will be returning to our fair shores tomorrow. 
 
 Sindri Þór Stefánsson, who has been in custody in Holland since last week, will return to Iceland tomorrow, Vísir reports. 
 
 Police in Suðurnes, southwest Iceland, will have to take a decision tomorrow as to whether to put Sindri in custody in his home country or just place a travel ban on him. Þorgil Þorgilsson, Sindri’s lawyer, told reporters he believes a travel ban would be “the best resort”. 
 
 As reported, it has come to light that the police had no legal authority to hold Sindri – who was not convicted of a crime, but was only being held as a suspect in a computer heist case – in the first place. 
 
 The crux of the matter rests on Iceland’s laws about holding suspects in custody. Sindri’s period of custody at Sogn Prison actually expired April 16. Earlier that day, Sindri appeared in court where the judge had said they would take 24 hours to decide whether or not to extend the period of Sindri’s custody. 
 
 While police contend that this effectively means he was still in custody, Kristín Benediktsdóttir, an associate professor in judicial procedure at the law department of the University of Iceland, says that Iceland’s constitution is very clear on the matter: you cannot hold someone in custody without legal permission to do so. 
 
 Here she refers specifically to a Supreme Court case from 2013. In that instance, a suspect was brought to court ten minutes before his period of custody expired. The judge in that instance also took a 24-hour period to decide whether or not to extend the period of custody. 
 
 The Supreme Court decided in that case that the police had no legal authority to hold the suspect while the judge made their decision, and the suspect was therefore unlawfully held in custody by the police during that 24-hour period.
– That an inmate escaped from an Iceland prison and fled the country on a plane that Iceland's prime minister happened to be aboard turns out to not be the wildest part of Sindri Stefansson's story. The 31-year-old is suspected of being one of a group of thieves who stole $2 million worth of computer servers used to mine bitcoin; he was arrested in early February, escaped to Sweden in mid-April, and spent five days on the lam in various countries. He's due to be extradited to Iceland Friday, and in his first interview since he was apprehended in Amsterdam, he tells the New York Times how easy it was to escape: Prisoners at Sogn can have phones, and he simply used his to look up flights the night before he fled. And here's the twist: The Times reports it's not illegal to bust out of prison in Iceland. As a former Icelandic Supreme Court judge explains: "Our system supposes that a person who has been deprived of his freedom will try to regain it. It's the responsibility of prison authorities to keep him there." And whether Stefansson should have even been in custody is up for debate: His custody order expired right before he escaped. He says police convinced him to sign a document that voluntarily extended his stay while a judge weighed whether to legally extend it. After giving his signature, he changed his mind. He says he didn't think police would look for him because of the looseness of the situation. The Reykjavik Grapeview reports police will now decide whether to keep him in custody in Iceland or just impose a travel ban. Another weird factoid from the Times: Authorities haven't been able to find the stolen computers, though they've even followed a psychic's advice in their hunt for them.