In 2003, a Gwinnett County jury convicted Danyel Smith of murdering his two-month-old son, Chandler. The state’s medical examiner ruled the boy’s death a homicide, caused by blunt force trauma.

The case involves the controversial medical diagnosis, shaken baby syndrome. In 2003, a Gwinnett County jury convicted Danyel Smith of murdering his two-month-old son, Chandler. The state’s medical ...