An investigation into Netherlands international footballer Quincy Promes, who is accused of stabbing his nephew at a family party, was reopened because his defence wants to know why he was being tapped by police, NOS reports.

Tapped conversations were used as evidence against Promes by the public prosecutor, and his lawyers have asked for more information about why the police had been given permission to keep him under surveillance.

Although the permission had been disclosed, the request for tapping – which would have revealed the reason – has not. An official court spokesperson told the NOS: ‘The court says that this is a document that needs to be added [to the dossier].’

The 31-year-old has been on trial in Amsterdam over the alleged incident in Abcoude in July 2020. Promes is accused of attacking his nephew after suspecting him of stealing a necklace from his aunt, injuring his leg.

The prosecution had asked for a two-year jail sentence and referred to tapped phone conversations in its case. It is understood that the tap was related to another investigation in which Promes was a suspect.

Promes was not in court for the trial, having been sold by Ajax to Spartak Moscow for €8 million two months after the incident. Russian media reported in January that he had applied for citizenship in the country, which would make him immune from extradition, but the player’s lawyer Robert Malewicz said he was not planning to give up his Dutch nationality.

Earlier this year, Promes’ lawyer denied that he had any involvement in payments to a drug dealer referred to in a hearing for a separate court case.