It has been widely reported that Savitsky “snapped” because Beloguzov repeatedly revealed the endings of the books that Savitsky was reading. However, it is unclear where this detail originated; an unnamed source told Russian news agency Interfax that tensions likely sparked from the men spending six months together in close quarters, but the source offered no further insights into what may have led Savitsky to pick up the knife and plunge it into Beloguzov’s chest.