A Swedish appeals court will announce on Tuesday its verdict in the trial of a former Iranian prison official handed a life sentence in a lower court for crimes committed during a 1988 purge of dissidents.
The verdict could have repercussions on the fate of Swedish prisoners in Iran, including EU diplomat Johan Floderus who has been held for more than 600 days.
Hamid Noury, 62, was arrested at a Stockholm airport in November 2019 after Iranian dissidents in Sweden filed police complaints against him.
In July 2022, a Stockholm district court convicted him of a "serious crime against international law" and "murder".
The case relates to the killing of at least 5,000 prisoners across Iran, allegedly ordered by supreme leader Ayatollah Khomeini, to avenge attacks carried out by exiled opposition group the People's Mujahedin of Iran (MEK) at the end of the Iran-Iraq war of 1980-88.
Sweden has tried Noury under its principle of universal jurisdiction, which allows it to try a case regardless of where the offences took place.
The district court found that Noury had been an assistant prosecutor in a prison near Tehran at the time of the events and had "retrieved prisoners, brought them to the committee and escorted them to the execution site".
Noury's defence lawyers have asked the appeals court to acquit him or reduce his sentence.
Hanna Larsson Rampe, one of his lawyers, told AFP the defence would not comment on the case before Tuesday's ruling.
The Svea Court of Appeal is scheduled to announce the verdict at 2:00 pm (1300 GMT).
The lower court trial was the first related to the mass executions in Iran in the 1980s.
It was particularly sensitive, as rights activists accuse senior Iranian officials now in power -- including current President Ebrahim Raisi -- of having been members of the committees that handed down the death sentences.
Noury's arrest and sentencing strained relations between Sweden and Iran.
As Noury's lower court trial was underway in Stockholm in April 2022, Iran arrested Johan Floderus, a Swede working for the EU's diplomatic service, as he was returning from a trip to Iran with friends.
Floderus' trial opened in Iran earlier this month, with Tehran accusing the 33-year-old of conspiring with Iran's arch-enemy Israel and of corruption on earth -- one of Iran's most serious offences which carries a maximum penalty of death.
Ahmadreza Djalali, an Iranian-Swedish academic, is also imprisoned and under threat of execution after he was arrested in Iran in 2016 and sentenced to death on espionage charges.
Iran has previously used detained foreign nationals as bargaining chips to secure the release of its citizens or frozen funds held abroad, including with the United States and Belgium.
Swedish media have speculated about the possibility of a prisoner swap between Sweden and Iran.
Mark Klamberg, a professor of international law and senior non-resident fellow at the Atlantic Council think tank, stressed that Tuesday's verdict would likely be appealed to Sweden's Supreme Court either way and any potential deal would need to await a final ruling.
Klamberg said a prisoner swap could be done two ways.
"The government could pardon Noury... But I don't think that will happen, it's politically impossible," Klamberg told AFP.
More likely, provided Stockholm would want a swap, would be for Sweden and Iran to agree that Noury must serve the rest of his sentence in Iran -- which in practice would likely mean that he would be a free man once he returned.
However, Klamberg noted that political considerations would then come into play.
For instance, agreeing could encourage Iran to continue with its policy of taking foreign citizens as hostages to use as bargaining chips, he said.
Another aspect was the reason for putting Noury on trial in the first place.
Klamberg said that for some victims it was important that Noury serve his sentence, while for others it may be just as important the Swedish court actually established in an authoritative manner what had happened in the 1980s, a judgment which is unique in itself.
"I think an important aspect for the Swedish government is how (a prisoner swap) would be received by the victims," Klamberg said.
Swedish Foreign Minister Tobias Billstrom has declined to comment on the possibility of a prisoner swap.
Throughout Noury's two trials, MEK supporters have protested outside the Stockholm courthouses and hundreds were expected to demonstrate when Tuesday's verdict is announced.
