Police have arrested a Bell Gardens woman on suspicion of child endangerment in the beating and sexual abuse of her 6-month-old son, who was clinging to life Tuesday after suffering a series of skull fractures, authorities said.
Martha Castro, 28, was arrested Sunday night after paramedics responded to a report of an injured child at her boyfriend's home in Ontario. Police describe the boyfriend as a "person of interest" in the investigation but did not release his name.
The baby is in grave condition and is not expected to survive. Castro remains in custody.