This case resonates a tad with the infamous Jack the Ripper case. The murderer in London who terrorised women in the Whitechapel area in 1888.
Over 200 books were written. Companies run Ripper days in London.The attraction is that the Killer was never caught. Researches even have their own description - Ripperologists.
The attraction for the JFK case is the alleged killer LHO never made it to trial so all and sundry can indulge themselves as latter day Sherlocks.
I could nominate a poster as a Sherlock impersonator...3 guesses..