After the proven substitution of children in Kabardino-Balkaria, a resident of St. Petersburg decided to take a DNA test with a man who grew up next door. The baby, who was given to them in the maternity hospital, died 11 months later. Until his death, his parents were sure that their blood-related boy was growing up in another family. However, the alleged brother himself does not believe that he could be in the family of someone else's mom and dad. So was there a substitution?