Because the hammer is completely intact, with no evidence that it is aimed as a weapon during the crime.
"Valley of fear" is the book written by Arthur Conan Doyle and tells one of the adventures of Sherlock Holmes.
In this book, we are introduced to the following elements:
- Sherlock is summoned to help with the investigation of a mysterious murder.
- This murder is based on a crime and the culprits must be found.
- Sherlock uses all his wit, reaching a conclusion about the crime halfway through the book.
- The other half of the book is used to describe how the crime took place.
During the investigation, Sherlock and his companions analyze all the possible objects used during the crime, among these objects is a hammer, which White Mason, one of the helpers claims, was not used during the crime.
He has this certainty, as the hammer was found without any marks of use, and there was no evidence at the scene of the crime that could have been caused by the use of the hammer.
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