I read a book titled 'An Isolated Incident' written by Susan R. Sloan. In chapter one of the book, she quotes
Murder, though it have no tongue, will speak.
How can this be interpreted in simple English?
It is a quote from Hamlet Act 2, if memory serves.
For murder, though it have no tongue, will speak.
Hamlet here is expressing his strong emotions and is determined to get to the bottom of the death of his father. He is saying murder is such a heinous act that it speaks for itself. In other words, its evilness is so self-evident.
Although a murder victim is dead and cannot speak, the crime will leave clues that will "speak" metaphorically to investigators.