[s2e24] Mmmystery On The Friendship Express -

Break down all the to Sherlock Holmes and Hercule Poirot.

Twilight Sparkle once revealed that the hardest part of the "MMMystery on the Friendship Express" wasn't actually finding the culprit—it was the paperwork she had to file with the Equestria Rail Authority afterward. [S2E24] MMMystery on the Friendship Express

There was one piece of evidence Twilight never mentioned in her final report. Break down all the to Sherlock Holmes and Hercule Poirot