"This case continues to be investigated as a kidnapping for ransom case," the FBI said in a statement.
The "Today" show host and her siblings made an emotional plea for the return of their mother, who remains missing in Arizona.
Investigations are continuing after the mother of "Today" show host Savannah Guthrie disappeared over the weekend in what authorities believe was a possible abduction.
Earlier this year, three people wearing masks allegedly forced their way into a home on Buck Branch Drive, demanding $1 million.
Despite being assaulted by four men, the victim managed to get his dog back.
FBI has taken the third suspect Eleodoro "Leo" Estrada-Hernandez, 37, into custody. He will be held at the Wake County Detention Center.
