Fayette County Coroner Dr. Phillip Reilly at first investigated whether the boy suffocated after learning his parents sometimes taped a pacifier in his mouth to keep him quiet. But months of testing revealed he had a skull fracture and died of head trauma, and police say Workman confessed earlier this month.
Workman and her public defender aren't commenting, nor is the boy's father who is not charged.
Workman was pregnant when her son died. Her new baby is in county custody.
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