Secret Captures by CIA

This article is about the secret capture of Muhammad Rahim a guy who helped Usama hide out at one point and a bunch of other nasty terrorist activity. The intresting part of the article is that the CIA had secretley detained and interrogated him back in April 2007 only now after almost a year of intergation does he get turned over to the military and guantanmo bay. So my question : We capture people for the intellegince but why not say we captured them ? Doesnt this give fuel to the counter-stratgies we have been talking about ? Why not tell everyone ?