On 9 February 2018, Seán Binder and one of his colleagues were arrested in Greece by Mytilene police. They were released after 48 hours, pending further investigation.

On 9 August 2018, they were arrested again, together with three other colleagues, and this time detained in pre-trial detention for 104 days. There are 24 defendants in total, with over 10 different nationalities.

On 5 December 2018, Seán and Nassos Karakitsos and the two others held in detention were released on bail.

In 2019, the Public Investigator closed the case file and sent it to the Judicial Council for a decision on whether a trial should proceed.

In August 2021, a trial date of 18 November 2021 was set for the alleged misdemeanours of the 24 Defendants. This hearing did not proceed due to the need for the matter to be heard by a different court.

At the adjourned trial on 11 January 2023, all misdemeanour charges were dismissed by the court in Lesvos following a request by the prosecutor. A different prosecutor (not the prosecutor who attended the hearing on 18 November 2021 or 11 January 2023) appealed against the dismissal of the charges to the Supreme Court on the basis that the lower court had erred in law in dismissing the charges.

That appeal was heard on 16 May 2023.

In early September 2023, the Supreme Court confirmed the misdemeanour charges against Seán and one other defendant were dismissed (all four charges, Forgery, Infringement of state secrets, Espionage, Possession of a radio without a licence).

In January 2024, the other defendants were again tried for the same misdemeanours. They were acquitted of all charges.