Shelbyville, Tennessee - Authorities haven't been able to question a woman who returned her adopted son to Russia.
Bedford County Sheriff Randall Boyce said that an attorney representing Torry Hansen, 33, said she refused to talk to authorities unless a charge was filed.
Artyom Savelyev, seven, flew to Moscow last week with a note from Hansen that said she no longer wanted to adopt him because he had problems.
"This child is mentally unstable. He is violent and has severe psychopathic issues," the letter said. "I was lied to and misled by the Russian Orphanage workers... regarding his mental stability."
Hansen's mother, Nancy, has said the child's violent episodes - which culminated in a threat to burn the family's home to the ground - terrified them.
Boyce said the US State Department knew of no federal laws that had been broken. He is requesting medical information from Russian authorities about the boy and any records that allege the boy was abused while in Tennessee.
District Attorney Chuck Crawford and other authorities are investigating abuse and child abandonment allegations.
Crawford said because the child flew alone out of Dulles International Airport near Washington, charges might have to be filed there. - Sapa-AP