CNN Forensic Files May 25, 2014 06:16:00
It's a horrible way to die. and you're very aware and very conscious until the very end of it. there is no way to kill yourself that way. >> when a person ingests arsonic the poison attaches itself to the hair follicles. as the hair grows the poison residue remains on the hair shaft and becomes a permanent record. so scientists cut nancy's hair into seven millimeter pieces. each piece corresponded to a two-week period. each piece was placed in a separate vial and then exposed to radiation in a nuclear reactor. >> the sample can be analyzed as is in most cases and weighed in. most other methods...
Source: archive.org