After revealing to Sherlock that the key was a hoax , he forces Sherlock into committing suicide in order to save his friends .
When Sherlock realises there is a way out as long as Moriarty is alive , Moriarty shoots himself in the head .
After revealing to Sherlock that the key was a hoax , he forces Sherlock into committing suicide in order to save his friends , but when Sherlock realises there is a way out as long as Moriarty is alive , Moriarty shoots himself in the head .