Putin’s “neurological development was significantly interrupted in infancy,” wrote Brenda Connors, an expert in movement pattern analysis at the U.S. Naval War College in Newport, R.I. Studies of his movement, Connors wrote, reveal “that the Russian President carries a neurological abnormality.”

The 2008 study was one of many by Connors and her colleagues, who are contractors for the Office of Net Assessment (ONA), an internal Pentagon think tank that helps devise long-term military strategy. The 2008 report and a 2011 study were provided to USA TODAY as part of a Freedom of Information Act request.

Researchers can’t prove their theory about Putin and Asperger’s, the report said, because they were not able to perform a brain scan on the Russian president. The report cites work by autism specialists as backing their findings. It is not known whether the research has been acted on by Pentagon or administration officials.