It is a shame that plod has got in on this one. They'll just be looking for evidence to prosecute and not dealing with the root cause. I truly feel for the family of the victim and his colleagues, not only for their loss but for the fact that it will a long time before anything constructive can be accomplished to prevent a reoccurrence. Like it or not, it is totally reasonable to protect MOD equipment with armed guards, but someone has to have a method of determining the sanity of those who are issued with firearms.