"Kill the messenger"

Why David Kelly chose to kill himself (assuming that he did) is something people can only speculate about. However pressure from his employers is far more likely to be a signifant factor in triggering whatever it was that apparently have made him decide that he'd sooner be dead than anything the media did.

It must be a very frightening thing to realise that you have made enemies of ruthless and powerful rulers who are in a position to take away so many things you value.