He stated he is under investigation and he is not allowed to discuss the aspects of detention (he was detained, but now seems to find himself at home or a hotel) and current investigation. He is still in Kharkov. Good he’s alive and apparently in good health.
It’s not clear who detained him, but it seems he was referring to legal authorities, not paramilitary type groups. Nevertheless, the information he shared was very scarce. All I resumed here comes from his discussion with The Duran team.
And some more information here:
„I was picked up by the SBU on Friday, April 15th, at a little after 1 pm, local time.„