That manner being... detained and expelled.
The party doing the expelling... Mugabe's ZANU-PF run Security Services.
The party getting expelled... Manfred Nowak, the United Nations Special Rapporteur on Torture.
Now this author is no particular fan of Professor Nowak, to say the least, but when he gets used as a pawn in the contest between Mugabe and the Movement for Democratic Change even he gets some sympathy.
Read all about it. It is just another example of how the "Unity Government" and the role of SADC in promoting said accommodation is a sham.