Woman disputes claim she knows whereabouts of missing kids

This Feb. 21, 2020, photo provided by the Hawaii Department of Public Safety shows Lori Vallow, the mother of two Idaho children missing since September. Vallow, also known as Lori Daybell, was arrested Thursday, Feb. 20, 2020, in Hawaii and is awaiting extradition to Idaho. (Hawaii Department of Public Safety via AP)

In this Feb. 27, 2020 photo Melani Pawlowski, right, is shown with her husband Ian Pawlowski outside a courthouse in Mesa, Ariz. Her ex-husband has alleged Pawlowski knows the whereabouts of two of her aunt Lori Vallow's two children, who have been missing since September. Pawlowski's lawyers denied the allegation and said their client has cooperated with authorities in the investigation. (AP Photo/Jacques Billeaud)

PHOENIX — The adult niece of an Idaho woman whose two children have been missing for five months is cooperating in the FBI’s investigation into the disappearance, undergoing three interviews with agents and surrendering her computer, the niece’s lawyers have said.