Police in Alabama found remains they say are likely Natalie DeBlase, a 5-year-old girl whose father is accused of murdering her, and her 3-year-old brother.
Mobile Police Maj. Kara Rose told The Associated Press that searchers found the remains in the woods off a rural road at around 9 a.m., a half-hour after beginning their hunt for the day.
The children's father, John DeBlase, is already charged with two counts of murder in the deaths of Natalie and her brother, Chase.
DeBlase's girlfriend, Heather Leavell-Keaton, who was arrested in Louisville, Ky., on child abuse charges in the case, was being extradited to Alabama where court officials told ABC News she would face upgraded charges.
Natalie was killed and buried in Alabama in March and Chase was killed and buried in Mississippi in June, police said. Mobile Police Officer Christopher Levy said confusion over DeBlase's statements initially led investigators to believe that the boy was the first to die.
Neither child was reported missing until November when Leavell-Keaton went to police saying she feared for the safety of an infant that she had with DeBlase. The baby is currently in state custody.
DeBlase's lawyer Jim Sears told ABC News Friday that he was informed that Leavell-Keaton would also be charged with murder.
"She will be charged with the murders, that's my understanding from the prosecutors," Sears said.
Mobile County District Attorney John Tyson would not confirm Sears' statement.
"At this point murder charges are not authorized by the facts we have discovered. Any investigation takes as long as it takes, and we will absolutely charge what we can as the facts are discovered," Tyson said.
"Currently we have upgraded her charges to aggravated child abuse, abuse of corpses. ... The investigation is vigorous, ongoing," he said.
Leavell-Keaton had been held in Louisville, Ky., on charges of child abuse in connection to the case. According to arrest warrants from the Mobile Police Department, she has been accused of submitting Chase and Natalie DeBlase to horrific abuse.
The arrest warrant charges DeBlase with allowing Leavell-Keaton to torture Chase while the two slept.
"Allowing Heather Leavell-Keaton (his girlfriend) to duck-tape the childs hands to the side of his legs, tape a broom handle to his back, placing a sock in his mouth and duck-taping it to his mouth, then making the child stand in a corner all night when they went to bed," the warrant says.
According to police Natalie was not spared the abuse allegedly meted out by DeBlase and Leavell-Keaton, his girlfriend since 2008.
According to a separate arrest warrant, DeBlase allegedly allowed Leavell-Keaton to duct-tape Natalie's hands and feet before stuffing her in a suitcase.
"Duck-tape the child's hands and feet, place a sock in her mouth, place her inside a black suitcase and leave it inside a closet from 8 a.m. until 10 p.m.," the warrant says.
Police have not yet given a cause of death for Chase or Natalie, but they believe the abuse played a major factor.
On Wednesday, police announced they had located the remains of Chase in woods just off a Mississippi highway.
Jackson County Sheriff Mike Byrd said during a press conference after the discovery that Chase was stuffed inside a black garbage bag, wearing only a diaper.