Jim Garrison (and later Oliver Stone, who resurrected Garrison) is the "Donald Trump" of JFK research. Like Trump, the populist JFK-CT draws in both kooks and ordinary citizens with niche concerns, and embraces any angle that keeps the notion of "conspiracy" alive, including themselves being a victim of the media and government agencies.
In the end, a jury of citizens brought down the charade in New Orleans, just as the forthcoming election will allow the vox populi to (probably) remove Trump. In both cases, somewhat hollow victories. Joe Biden is yesterday's man.