Or not far enough. Garrison, to be sure, took it too far and subjected it to the full rigor of a court trial. They found his gray areas, in spades. Harris takes it too far too, in that he's fleshed his hypothesis out to a level of detail that would almost be testable if it weren't almost entirely based on speculation, specious reasoning, and subjective opinion, thereby making it qualitatively untestable.
Most don't. They don't even believe in giving you something whose ambiguity can be measured. Instead they think their task ended the moment they saw gray in something you said sounds credible to you.
Agree 100%.
Approaching Harris from a former JFK CT perspective he tries to marry an abstract fact (people being startled by loud noises universally) and another abstract data point (the volume of a MC being fired) to base a hypothesis on using the silent Zapruder film. His gray area is the discrepancy of the witnesses in Dealey Plaza as to what they heard, and then cherry-picks the desired results to cite and supporting evidence.
In his case the gray area came from the lack of reliable sound recording of the incident and a variety of conflicting testimony and personal accounts of how many shots were heard.
In the old days I might have bought into that. But knowing that the location has a notorious echo means that absent new film footage with sound, any thesis where sonic evidence is the basis is useless. He then compounds his problem by suggesting there was a silenced rifle used, which from a logistical standpoint would have been a nightmare in 1963. I asked him to at least suggest a weapon that could be silenced and still do the damage done to the victims in the limo. Instead of at least citing the few suppressed weapons in a spaghetti against the wall approach, he blew the question off, and that is where his thesis dies.
Worse, Harris goes on to suggest the Mafia was behind it, and wanders into the Mauser Myth. Both have been debunked thoroughly.
For fun I asked him to cite all the times the Mafia used a long rifle to rub someone out, and he could not. To Harris the Mob is a gray area to shroud his thesis with enough What Ifs to keep it afloat. To any reasonable researcher, or casual reader of true-crime books the Mafia is not a gray area. They have a modus operandi, they have a track record, they have mountains of criminal records across multiple continents. That is data that can be collated. There are names, dates, and testimony that give the interested world a clear picture of how the Mafia operated in 1963.
The murder of JFK was not in their playbook.
Using a patsy was not in their playbook.
Hiring LHO to shoot JFK would have been ridiculous, and having him "in on the plot" would have been an act of unprecedented stupidity.
These conclusions are mine, but I think they stand up. The Mafia is not the gray area it once was, and any legitimate researcher into the JFK assassination would learn this quickly.
Honestly, when all of the relevant documents of the assassination, the history of the CIA's programs to kill Castro, Cuban intelligence history in the US and Mexico, and remaining FBI files on Mafia figures are accessible I don't see the bottom line for November 22, 1963 changing. Oswald killed Kennedy...by his lonesome.
Sorry to ramble.