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voice, nothing. i want to know what's happened to my mom. >> i didn't think it was an accident. >> when did the whisper? start >> immediately. >> i believed she'd been murdered. >> there is a dark business going on at this nightclub. >> that is something buddy one talking about what happened at night? >> -- it was a sacred thing for us to do. >> i thought we were finally getting justice, i was absolutely shocked, i was shocked. >> if you have a feeling in your gut and in your heart, fight, and don't ever give up. >> a few feet from the city limits of toledo, ohio, a car swings around...

>> if you have a feeling in your gut and in your heart, fight, and don't ever give up. >> a few feet from the city limits of toledo, ohio, a car swings around a corner on a dusty stretch of road. it's, dark we hours, just stabs of light spilling from the house. most people are asleep, he could so easily have missed line in the grass on the side of a road, her feet drawn up to her chest, barely breathing, first drove right by her, the story went and then doubled back for -- a 30 year journey from one lonely child. >> there's all these lives that have not been answered, why hasn't she ...

Forensics. >> this really becomes a case about science, doesn't it? >> if the science didn't work, if the jury didn't understand it or didn't buy into it, it was gonna be a not guilty. dr. diane scala barnett, the coroner who had performed the autopsy on dana's exhumed body told the jury she'd been able to get a better look at dana's skull than the first coroner. >> i saw separate fractures and the pattern of fractures only after the bone was cleaned. >> there were three impact patterns, three distinct patterns. >> and what would have caused those? >> a beating. >> a beating? some sort of blud...

Forensics. >> this really becomes a case about science, doesn't it? >> if the science didn't work, if the jury didn't understand it or didn't buy into it, it was gonna be a not guilty. >> reporter: dr. diane scala barnett, the coroner who had performed the autopsy on dana's exhumed body told the jury she'd been able to get a better look at dana's skull than the first coroner. >> i saw separate fractures and the pattern of fractures only after the bone was cleaned. >> there were three impact patterns, three distinct patterns. >> and what would have caused those? >> a beating. >> a beating? some...

Happened. what evidence was there of murder? and here was the heart of the prosecution's case -- the forensics. >> this really becomes a case about science, doesn't it? >> if the science didn't work, if the jury didn't understand it or didn't buy into it, it was gonna be a not guilty. >> reporter: dr. diane scala barnett, the coroner who had performed the autopsy on dana's exhumed body told the jury she'd been able to get a better look at dana's skull than the first coroner. >> i saw separate fractures and the pattern of fractures only after the bone was cleaned. >> there were three impact pat...