it looked like something that i remember reading about in medical school. >> debbie's red blood cells had degenerated, a condition known as karyorrhexis. >> i ran down to the library and i got out a book on toxicology and i also went on to something called medline on the computer. >> the medical literature described some possible causes. when her doctor factored in her other symptoms -- numbness of her hands and legs, disorientation and nausea, the answer became clear. >> i was able to complete the description of arsenic in my mind, and it fit her perfectly. >> arsenic is a heavy metal poison and not one you normally encounter. further testing indicated debbie had an arsenic level of 29,580 micrograms per liter, one of the highest ever recorded in a living person. >> almost sounded like a mistake in the lab reading, but it