A Jordanian MP and former judge say they believe authorities broke the law with the presumed extradition to the UAE of an Emirati-Turkish dual citizen after his arrest in Amman this month.

Khalaf al-Rumathi, 58, was convicted by an Emirati court in 2013 in a mass trial of 94 critics of the Emirati government – dubbed the “UAE94” – which human rights groups have widely criticised as grossly unfair.

Rumaithi has been living in self-imposed exile in Turkey for more than a decade. He was understood to be visiting Amman to look at schools for his son when he was arrested on 8 May on a warrant issued at the UAE’s request.

The businessman was scheduled to appear in court for an extradition hearing on 16 May, but his family and lawyer have said they lost contact with him on 9 May.

Neither Turkey, Jordan, or the UAE have officially commented on Rumaithi’s whereabouts.

On 17 May, the state-run Emirates News Agency reported that he had been “received”. In the absence of further public information, many following the case believe this to be true.