Story highlights Jim Duncan is serving a 70-year sentence for aggravated child abuse

Florida man hopes he will get a new trial and clear his name

(CNN) Jim Duncan has always insisted he never broke the bones of his infant son, and now a Florida appeals court has agreed that Duncan deserves a hearing for a new trial.

The central Florida man is more than two decades into a 70-year sentence for aggravated child abuse. He was convicted of the crime after he and his wife brought their infant son Kody to the emergency room in 1993 when they noticed he was in pain and not using the left side of his body.

Jean Casarez

The doctor found 13 broken bones and a skull fracture in his X-rays but no bruises. The hospital called police.

"I am innocent," Duncan, now 51, told CNN. "I did not harm my son."

Prosecutors are standing by the conviction, but Duncan said he hopes a new lawyer, and new medical science, will end his nightmare and bring him home.

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