The remains were returned to the cemetery and reinterred, with appropriate honors, in the mausoleum.[167]
Neutron activation analysis conducted at Oak Ridge National Laboratory revealed no evidence of poisoning, as arsenic levels were too low.[167][168] The analysis concluded Taylor had contracted "cholera morbus, or acute gastroenteritis", as Washington had open sewers, and his food or drink may have been contaminated. Any potential for recovery was overwhelmed by his doctors, who treated him with "ipecac, calomel, opium, and quinine" at 40 grains per dose (approximately 2.6 grams), and "bled and blistered him too."[169]
Political scientist Michael Parenti questions the traditional explanation for Taylor's death. Relying on interviews and reports by forensic pathologists, he argues that the procedure used to test for arsenic poisoning was flawed.[170][171] A 2010 review concludes: "there is no definitive proof that Taylor was assassinated, nor would it appear that there is definitive proof that he was not.