That picture has me confuzzled. The gun is six days long, that's OK - but when is the calendar? Some start with Monday and finish with Sunday. Some start with Sunday and finish with Saturday. The 26th is marked

as "school", so I'm going with that being a Friday and the calendar ending on a Saturday - but what year?
The month planner below has two months - the second of which has 28 days - that finish on what would

appear to be a Wednesday. That was not 2014.

So..... I'm going with;
Miss Scarlet in the library with a lead pipe.