Claims and Criticism
The contents of the report, in particular Leuchter's methodology, are heavily criticised. James Roth, the manager of the lab that carried out the analysis on the samples Leuchter collected, swore under oath to the results at the trial. Roth did not learn what the trial was about until he got off the stand. He later stated that cyanide would have only penetrated to a depth of around 10 micrometres, a tenth of the thickness of a human hair. The samples of brick, mortar and concrete that Leuchter took were of indeterminate thickness: not being aware of this, the lab ground the samples to a fine powder which thus severely diluted the cyanide-containing layer of each sample with an indeterminate amount of brick, varying for each sample. A more accurate analysis would have been obtained by analysing the surface of the samples Leuchter collected. Roth offered the analogy that the investigation was like analyzing paint on a wall by analyzing the timber behind it.
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