Without the misinterpretation of the autopsy blood digoxin levels, there would not have been any consideration of digoxin poisoning – and no criminal investigation would have occurred. Furthermore, a chemical used in pharmaceutical natural rubber (in syringes, ampoule seals and I.V. apparatus) manufacture, MBT (mercapto-benzothiazole), leaches into injections (Ref. 1)(Ref. 1: J.H. Meek and B.R. Pettit, Avoidable accumulation of potentially toxic levels of bezothiazoldes in babies receiving intravenous therapy;Lancet, 1985, Vol. 2, pp 1090–1092). It can cause death as a cumulative toxin (Ref. 1), or from anaphylaxis. MBT is measured as digoxin (Ref. 2:J.J.Reepmeyer, Y. H. Jule, "Contamination of Injectable solutions with 2-mercaptobenzothiazole from rubber closures", The Journal of Pharmaceutical Sciences, Vol. 72, 1983, pp 1302–1305), using the test methods applied in the criminal investigations of Lucia de Berk and of a Canadian nurse, Susan Nelles.