Haven't read the article (link isn't working- get to a metro page but no article), but this is often misreported. It wasn't chelation that killed him, he was given the wrong drug or the correct drug in too high a dose (can't remember which)- i.e. it was a standard medical error. (That info came from the Mum of the boy btw). Apparently he was doing really well after the first 2 rounds of treatment.