Voronezh State University
In 1950, Boris Olshansky, a defector to the United States and a former Sovier Army officer who claimed to be a former associated professor at the Voronezh State University and Burdenko's friend, published an article and in 1952 — testified in court that in April 1946 Burdenko had revealed to him that he knew about the execution been carried out by the NKVD, recognizing it as a "mistake" of the agency, and stating that for him as a medical man "it was quite clear" that the corpses dated back to 1940. In 1957, Olshansky returned to the USSR where he claimed that his testimony was made up by the American Committee for Liberation and was given by him under fear of repressions, although according to Democratic United States Representative Dan Flood, Olshansky "appeared and testified voluntarly". However, other doubts arose as to the credibility of Olshansky's testimony the following years.