The FBI maintains a kidnapped and missing persons page too.
"On October 22, 2014, surveillance photos depicting an unidentified male and female were obtained by the Warwick, Rhode Island Police Department. Authorities have reason to believe this male and this female may have traveled together through areas of Warwick, East Providence, and Pawtucket, Rhode Island, as well as Shrewsbury, Massachusetts.
The surveillance photos of the female are of particular interest to the FBI because the picture of the unidentified female bears a strong resemblance to missing person Ashley Summers. The FBI never closes a missing child’s case until the child is located, even if that child is now an adult. While the FBI realizes that the unidentified female may have no connection to Ashley Summers, due to the physical similarities, it considers this a potential lead that must be followed.