Thirty-year-old Wendi Leanne Hooper Stanford was being held without bail Thursday on charges of homicide and child endangerment.
Two-month-old Christopher Harbin died in Nov. 2003, two days after Stanford called 911 to report he was unresponsive. An autopsy determined that the baby died from a skull fracture.
Lehigh County prosecutors said there was never evidence beyond a reasonable doubt that would allow for charges. That changed when the case was recently re-examined and investigators conducted a new round of interviews.
Stanford and the boy's father are divorced.