Deborah Bertram from the FBI released the following statement at 10:50a.m.:
FBI Special Agent in Charge David J. Johnson of the Salt Lake City Division, and Chief of Police Frank DiFonzo of the Sidney, Montana Police Department, would like to inform the public that there has been a significant development in the investigation of the disappearance of Sherry Arnold. Based on a tip from the public, law enforcement took one adult male into custody, and another adult male is being questioned by police. The investigation to determine what happened to Ms. Arnold continues.