In the trial against Jérôme Boateng, there was an incident with his security service at the Munich Criminal Justice Center on Friday.
Law enforcement officials took their personal details after a witness at the trial said she was filmed entering the courthouse and felt threatened.
The public prosecutor requested that the personal details be determined on the grounds that a criminal offense or the preparation of a criminal offense could have occurred.
The woman, who said in court that she had seen Boateng attack, hit and insult her then-girlfriend while on vacation in the Caribbean, burst into tears on the witness stand.
"You're just afraid," she said, "that you'll be threatened or your family will be threatened."
After determining the personal details, Boateng's lawyers emphasized that a "security service, which also looked after Mr. Boateng yesterday", only "determined the environment" in order to be able to evaluate "Boateng's security situation".
It was a pure "object clarification" and the witness was not targeted and only filmed from behind.