SHELBYVILLE, Tenn. (AP) — Local authorities said Monday they haven’t been able to question a Tennessee woman who returned her adopted 7-year-old son to Russia, where authorities threatened to suspend all child adoptions by U.S. families.

Bedford County Sheriff Randall Boyce said at a news conference that an attorney representing Torry Hansen said the 33-year-old woman refuses to talk to authorities unless a charge is filed. An adoption agency assigned to check on the family said officials there haven’t been able to contact her since late March.

The boy, Artyom Savelyev, flew unaccompanied to Moscow last week with a note from Hansen that said she no longer wanted to adopt him because he has psychological problems.