Experts who once backed 'shaken baby' science now fight to free imprisoned caregivers

Brian Wharton, the chief detective of a small police force in East Texas, had seen his share of tragedies on the job, but he had never handled a case like Robert Roberson’s : In January 2002, Roberson, a 35-year-old single father, arrived at the emergency room with his 2-year-old, Nikki, limp and bundled in a blanket.

Roberson said the girl had fallen from bed overnight, but when nurses and doctors evaluated her severe head injuries, they grew suspicious. Wharton led the investigation.

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