* When Errol Morris interviewed Roth for Mr. Death, the chemist had said that the HCN would “probably not . . . penetrate more than 10 microns. Human hair is 100 microns.” Though he qualified his observation with the word, “probably,” the HCN most likely penetrated far deeper than 10 microns. However, his argument about severely diluting the sample is valid. Richard Green, a physical chemist with a Ph.D. from Stanford University, noted another serious problem with Leuchter’s so-called methodology. He gave the lab samples of vastly different sizes. The HCN concentration was certainly not homogeneous. Therefore, by studying different-size samples, the results of any test become highly suspect. Richard J. Green, “Expert Report,” IvP&DL, Court of Appeal, 1996-I-No. 1113. See: http://www.holocaust-history.org.