Edit: I can't reply to the child but here are some salient quotes from the wiki...
"I will wait until the end of the week before judging – many dark actors playing games. Thanks for your support." - Dr Kelly
"it was subsequently established that neither the knife nor the blister packs showed Kelly's fingerprints on their surfaces"
"The former leader of the Conservative Party, Michael Howard, and the former Liberal Democrat MP, Norman Baker, both think Kelly was murdered.[173] In 2007 Baker published The Strange Death of David Kelly in which he argued that Kelly did not commit suicide."
It was about timing too - it was a critical point for Blair and Bush getting the war they so desired. Keeping in mind there was already huge opposition to the war, proper 1st hand evidence being revealed at that point could well have resulted in Blair having to stand down, and potentially even the British not joining the war. Which of course the US services would not have liked.
I do see your point, mind, but I don't think such damning circumstantial evidence is "shit"; by that logic, MI6 could never be responsible for anything, unless of course they signed a confession.