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>> you've maintained all through this that you didn't kill your child. do you think you're about to be -- get some acquittal there? >> yes, sir, definitely. >> stallings' defense team brings on an expert acceptable to the prosecution. he is dr. pierro renaldo, a world-renowned pediatrician and biochemical geneticist from yale university. renaldo studies ryan's serum and confirms drs. sly and shoemaker's results, that ryan did have mma. he looks for any evidence of ethylene glycol in the sample and lab data, but like shoemaker and sly, finds none. >> the compound being identified as ethylene gl...

The evidence of methylmalonic acidemia had been specifically forbidden at the trial, well, that seemed really just unjust. and so i took it upon myself to try to find out exactly what the laboratories had done who claimed they found ethylene glycol. >> shoemaker teams up with senior st. louis university biochemist dr. william sly. the scientists have a hunch ethylene glycol may never have been present in ryan's blood and that the lab technician may have made a mistake. under dr. sly's supervision, shoemaker runs tests on ryan stallings' blood sample to see if they can detect elements that can ...

This that you didn't kill your child. do you think you're about to be -- get some acquittal there? >> yes, sir, definitely. >> stallings' defense team brings on an expert acceptable to the prosecution. he is dr. pierro renaldo, a world-renowned pediatrician and biochemical geneticist from yale university. renaldo studies ryan's serum and confirms drs. sly and shoemaker's results, that ryan did have mma. he looks for any evidence of ethylene glycol in the lab data but like shoemaker and sly finds none. >> the compound being identified as ethylene glycol, it was obviously something else. the dat...