In that case, the father was found not guilty of involuntary manslaughter and Russia has complained of acquittals or light sentences in other such cases.
The Investigative Committee, Russia's top investigative body, on Friday complained that its attempts to have the acquittals overturned or reconsidered had been ignored by the United States. Under U.S. law, acquittals are final except in rare cases.
Russians also bristled at how the widespread adoptions appeared to show them as hardhearted or too poor to take care of orphans. Astakhov, the children's ombudsman, charged that well-heeled Americans often got priority over Russians who wanted to adopt.
A few lawmakers even claimed that some Russian children were adopted by Americans only to be used for organ transplants or become sex toys or cannon fodder for the U.S. Army. A spokesman for Russia's dominant Orthodox Church said that children adopted by foreigners and raised outside the church will not enter God's kingdom.
Mansur Mirovalev and Nataliya Vasilyeva in Moscow contributed to this story.