The silent witness does not lie. The silent witness is irrefutable. He is the one who whispers the unvarnished truth. He is the crucial witness. Every piece of evidence left at the crime scene by the perpetrator is a silent witness. The body and its position are silent witnesses. The murder weapon is silent witnesses. Every piece of evidence, no matter how small, is silent witness. My task is to interrogate each of these silent witnesses to discover the identity of the unknown perpetrator. Every perpetrator has specific habits, even in committing a crime, that lead him to choose things related to his personality or his motives. These pieces of evidence will bear witness. They will answer my famous questions: Why? How? When? And who? For every piece of evidence is also a witness, with a story to tell, and I am trained to listen to the stories of these witnesses!