The truth about John Lennon's murder

In the amazing Human Zoo that is t'interweb, I have a special place in my heart for the quite wappy Steve Lightfoot. I've known about Steve for as about as long as I've been using the web (which would be ooh, about eight years). Steve has been protesting, stalking and pamphleteering with a zeal and lack of conventional logic that is almost endearing. Why?

Because Steve Lightfoot believes he knows who really killed
John Lennon.
Find out who here: but beware - it doesn't make an awful lot of sense. Cuckoo!