Just because you're not aware of the any reason for Dr Kelly to be killed, doesn't mean there wasn't any - or do you think the government would run all such information past you first, just in case you were interested? My point was that you can't make blanket statements like "there was no reason" without being in full possession of the facts - and unless you're an MI5 spook, you're not.
Also, much like DrJazzz isn't allowed to get away with using 'facts' found on bizarre unattributed websites to support his arguments, you cannot come to the conclusion that the government has never killed anyone simply because nobody on an internet bulletin board can pluck names out of the air at a moments notice.