It is now thought that the Romanov family made up evidence to make things looks as if Boris Godunov had been guilty of the murder of Ivan’s son. Karamzin, who later wrote a history of Russia, made it look as if it were true that Boris had murdered him. When Pushkin wrote his play "Boris Godunov" he followed Karamzin’s version of the story and this is also the story as told in Mussorgsky’s opera "Boris Godunov".