The Ideal Suspect

Create a chilling narrative that revolves around a perfect crime committed by an unexpected suspect.

Explore the intricacies of a perfectly executed crime, focusing on the misleads and false trails that protect the culprit until the end. Who is the unsuspected suspect? An innocent looking neighbor? A best friend? Or maybe even the investigating detective? This prompt delves into deception, the building tension, and ultimately, the shocking revelation.