Tia Welles, a 23-year-old Willingboro resident, was being held in the county jail on $750,000 cash bail after being arrested Thursday morning on a murder charge.
Prosecutors say Collins Bulluck Jr. was found unresponsive in Welles' home on Sept. 10 and died the next day at Cooper University Medical Center in Camden. An autopsy determined that the child was beaten to death, but further details were not disclosed.
A prosecutor's office spokesman did not immediately return a telephone message asking if Welles had retained a lawyer. She is scheduled for a first court appearance on Monday.