Two sources: Lisa Pease and James Corbett.
Lisa Pease has studied the assassination of JFK, RFK and MLK for a few decennia.
She is just looking: what facts are true, what facts are false.
That is of course the essential thing one must know, before making a hypothesis or a theory.
Here is a 1 hour interview with Lisa: ( Podcast )
Here is Lisa's website: http://realhistoryarchives.blogspot.jp/
I want to publish an exact copy of one of her blogs here. Its is interesting.