In Hansen's note to Russian officials, she called her son "dangerous."
"I no longer wish to parent this child," Hansen's note read.
"This child is mentally unstable," Hansen wrote to the Russian Ministry of Education. "He is violent and has severe psychopathic issues/behaviors. I was lied to and misled by the Russian orphanage workers and director regarding his mental stability and other issues."
"The first day when he came to Moscow he didn't say nothing because he was disoriented because the mother of Torry Hansen told him that it would be a kind of trip or vacation," Astokhov said. "And he was surprised when came to Moscow."
According to government statistics, the number of Russian children adopted to U.S. families has sharply declined in the last 10 years, down from a high of 5,862 in 2004 to 1,586 last year.
ABC News' Ashleigh Banfield, Kirit Radia, Zoe Magee, and Lee Ferran contributed to this story.