Dr. J. Stephen Morris (Ph.D.) Lauder, Nuclear Analysis Program. University of  Missouri-Columbia. "The arsenic concentration found (in Srila Prabhupada's hair) was 2.6 micrograms arsenic per gram of hair (or 2.6 parts per million i.e. 2.6 ppm). The concentration is approximately 20 times higher than what I would consider a normal average for unexposed individuals living in the United States......." 

Richard. T. Callery. (M.D., F.C.A.P) "In my opinion, to a reasonable degree of medical certainty, that this individual, (Srila Prabhupada) with the history of multiple myocardial inferts (?) and non insulin dependent diabetes mellitus and considering his age would be an individual in frail health in which a chronic administration or exposure of arsenic leading to toxic levels would be expected to be a significant contributing condition to his death....." (Richard. T. Callery. M.D.,F.C.A.P. Chief Medical Examiner. Director, Forensic Sciences Laboratory. National Medical Services).