The woman, who is not being identified because of the ongoing nature of the investigation, was arrested late last week.

Sgt. Bob Boese, with the Los Angeles County Sheriff's Department, said Sunday the woman was arrested with help from tips from the public and media coverage.

>> Read more trending stories

The baby was found buried beneath dirt and pieces of asphalt and swaddled in a blanket near a riverbed in Compton, California Nov. 28.

The baby, estimated to be between 24-48 hours old, had about an hour left to live before authorities found her from her muffled cries.