Getting an accurate third-party history can be extremely aggravating, particularly when the precipitating incident wasn't observed by the person giving the history. Which, in the case of poisoning, is usually the case.
Iron poisoning is a tricky bastard.
The toxic dose is something of a debate, since no two people will have the same reaction. How ever you look at it, this is a lot of iron, which can be caustic to the GI tract, resulting in hemorrhagic gastroenteritis. The liver takes the most damage after an iron OD, but any other organ can be damaged. Stage three features disruption of cellular metabolism and, among other things, renal and cardiac failure. This is where the kid was when she came back.