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He found something else. >> there was a compound that was very highly elevated in the serum compound called propionic acid. it comes off very close but not identically with ethylene glycol. he and i speculated that that might be the basis of a misidentification that led to the incorrect diagnosis of ethylene glycol poisoning. >> propionic acid is often produced in patients who have mma, the rare genetic illness diagnosed in ryan's brother d.j. the only difference between propionic acid and ethylene glycol is a few carbon atoms. to find out if other labs were capable of misreading propionic aci...

Similar to the peak of ethylene glycol, but when the two peaks are superimposed, there's a clear separation. it's a shocking result. the compound in ryan's blood was not antifreeze. >> so you could say wait a minute, this is not ethylene but must be something else. >> that something else turned out to be propionic acid, a compound found naturally in those who suffer from ryan's genetic illness. because of the similarity in boiling temperatures, sly and shoemaker believe the lab and toxicologist misread the result as ethylene glycol. the scientists now believe patty is innocent, and they approa...

When the two peaks are superimposed there was a clear separation. it's a shocking result. the compound in ryan's blood was not antifreeze. >> so you could say wait a minute, this is not ethylene but must be something else. >> that something else turned out to be propionic acid, a compound found naturally in those who suffer from ryan's genetic illness. because of the similarity in boiling temperatures, sly and shoemaker believe the lab and toxicologist misread the result as ethylene glycol. the scientists now believe patty is innocent, and they approach both the prosecution and defense lawyers...