happened was is that they checked these bags after people died. they said what is going on here and they all were given i.v.s with bags from the same company and they found that there was a bacteria inside called seratiamarsesessions. you know in your bathroom where the grout gets grimy? that is the bacteria. >> how does that happen? >> that is the million dollar question. it was supposed to be sterile. they don't know. was a worker not washing his hands. was the raw ingredient contaminated. nobody knows and what they need to find out. >> this contaminated liquid pumped into the veins of nine patients or more. >> 19. >> 19 patients. >> right. >> at what point did hospital officials realize that something was wrong, that these patients were failing? >> well, they usually see, we're told by the state of alabama, like, let's say, maybe one case of this happening with this particular bacteria. when they started to see more than one, they said, wait a minute.