STATEN ISLAND, N.Y. -- Prosecutors revealed sickening details Wednesday alleging that the babysitter charged with murdering a 16-month-old boy in her care had tortured and sexually abused the defenseless child for two days before he died.

Gloria Fields, 31, pleaded not guilty for the brutal killing of Anthony Delgado during her arraignment in Criminal Court.

She stayed silent during the proceeding, while several of the victim's relatives who were crowded into the St. George courtroom sobbed loudly and hurled profanities at the defendant.

"For 48 hours, this depraved woman systematically tortured a 16-month-old baby," said District Attorney Michael E. McMahon in a statement. "No creature on this Earth, let alone an innocent child, deserves to undergo such horrific torment. I want to thank the NYPD for their efforts in investigating this case and I want to ensure the public that my office intends to aggressively prosecute this atrocious crime."

Marta Delgado, the victim's mother, had left her son with Fields on Friday, a police official said. She lived in the same building and had babysat for the mom at least six times, according to the official.

Surveillance footage from inside the building shows Fields casually smoking a cigarette and dragging the boy's lifeless body around the hallway before slamming him to the ground, the prosecutor said. She then brought the child to his grandmother's apartment, according to the prosecutor.

Anthony was unconscious when EMS responded to a 911 call Sunday night at the Terrace Gardens apartment complex at 195 Steuben St. in Concord, where both Fields and the boy live, police said.

Fields, who has nine prior arrests, was remanded to jail without bail following her arraignment Wednesday afternoon.

Her next court date is scheduled for March 21.

Outside the courtroom, family members questioned why anyone would commit such vicious acts.

"I can not believe that one person would take the value of a child and do the things that she's done to that baby, an innocent baby," said the child's great aunt, Linda Cromwell.

Roger Simpson, who said he's the child's grandfather on the dad's side, claims that the couple had broken off their relationship in December, and that the mother had custody of the child.

Roger Simpson, who said he's Anthony's Delgado's grandfather on his dad's side, said he wants to see the babysitter go to jail for the rest of her life. (Family photo)

He said he didn't know why the mother left her son with Fields, and that he had never met the woman before.

"I want to see her go to jail for the rest of her life," he said of the babysitter.

The distraught mom and her family sat on the opposite side of the courtroom, many crying throughout the arraignment.

They refused to comment afterward when questioned by reporters, sparking a brief melee outside the courthouse that was quickly brought under control by police.

Fields is facing a slew of charges, including second-degree murder, aggravated sexual abuse, first-degree manslaughter and aggravated murder, according to court documents.