TV pundits and millions of viewers were stunned when Casey Anthony was acquitted of killing her two-year old daughter. But the realities of criminal justice are a long way from such gritty productions as CSI. Juries must find defendants guilty beyond a reasonable doubt and, especially in the killing of children, that certainty can be hard to come by. Caylee Anthony's body was found six months after she died. The defense presented expert testimony that contradicted prosecution arguments and raised questions about circumstantial evidence. A.C. Thompson, with ProPublica, was lead reporter in Child Cases, a series that aired last week on NPR and Frontline.
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