"2. I am unsure whether these individuals have been charged. Charges can only be instituted on the advice of the DPP. They can be questioned. As far as I know, no arrest warrant is required as in the states."
Another loophole to the above,charges will be instituted with direction from another body [if i can recall the special prosecutors] ,the clearance was given by the DPP.
I read it in one of the media.