Introduction
Overall summary of logic
The fragments and the reasons for analyzing them
      The fragments recovered
      The number of fragments in Q9
      The number of fragments in Q4,5
      Chains of custody and planted fragments
      Concern about the weight of CE 399
      The lack of debris on CE 399
      The reasons for analyzing the fragments
Using chemical data to determine origins
The FBI analyzes the fragments spectroscopically
      Optical emission spectroscopy
      How the FBI used OES on the fragments
George Michael Evica misuses the FBI’s results
Neutron-activation analysis offers better prospects
      When NAA was developed
      How NAA works
      The critics press for NAA of the fragments
      Secret NAA by the FBI revealed
The FBI tries NAA on the fragments
      It took a push from the AEC
      How the FBI did its NAA
      The FBI’s results and conclusions
      Public vs. private conclusions
      The FBI’s NAA was far better than portrayed
      Guinn finds a systematic error
      A second systematic error
Guinn’s neutron-activation analysis
      The samples that Guinn analyzed
      Guinn’s procedures and their compromises
      Guinn’s results
      Guinn’s conclusions
      The fragments are all from WCC/MC bullets
      There are two distinct groups of fragments that make physical sense
      The groups agree with the FBI’s groups
      The groups support two or more bullets
      Implications for the assassination
      Challenges to Guinn's results
        Guinn had previously worked for the Warren Commission
        Wholesale planting of fragments with different weights and identities
        Heterogeneity of antimony
      Hints about the heterogeneity of Sb
Wallace Milam and the heterogeneity of Sb
      Enter Wallace Milam
      The essence of Milam’s criticism
      Others join in trashing Guinn
The key problem of the tight groupings
      The flaw in Milam’s reasoning
      The groupings are not a product of chance
      Chance of single fragments coming from other sources
Resolving the logical incompatibility
      The fact is more important than the explanation
      Is the organizing force natural or sinister?
      The FBI’s NAA data hold the key
      Benefits of this new explanation
      Broader implications for the assassination
      Examples of the workaround procedure allowed by the NAA data
        The location of the rear head wound (entrance)
        The location of the forward head wound (exit)
        The height of the back wound
      The missing lead, the Tague fragment, and the missed shot
      Potential problems with this Tague scenario
      The missed shot
      The final shooting scenario
Potential objections to the full explanation
      The statistical base is weak
      Wrong model of mixing?
      Proof or hypothesis?
      Quarters of one bullet overlap (in Sb) those of other bullets
      Wouldn't more analyses of background WCC/MC bullets be in order is Guinn had grossly mismeasured their heterogeneities?
      Too risky when a whole explanation hinges on one calculation that the two tight groups could not have arisen by chance?
Conclusions—The NAA as Rosetta Stone
Reflections on why it took so long
      It required logic rather than deep knowledge of NAA
      Why didn't people grasp the true significance of the NAA data?
      Where were the academics?
      Why did J. Edgar Hoover hide the OES data?
      Why did Hoover hide the NAA data and the FBI's full understanding of it?
      The societal cost of hiding the FBI's full understanding
      Is this the real cover-up of the assassination?
Time to let go and move on
Acknowledgments

Ahead to Abstract
Back to NAA and the JFK Assassination
Back to NAA