(1) What (a) is the current status of the Directorate for Priority Crime Investigation’s investigation into case IR 2016/03/71 and (b) are the charges contained in the docket; (2) whether any suspects have been arrested to date; if not, why not, in each case; if so, what are the relevant details in each case; (3) whether any (a) suspects or (b) witnesses have been interviewed; if not, why not, in each case; if so, (i) when and (ii) what are the further relevant details; (4) when are the specified investigations anticipated to be finalised?