Today, criminal investigation doesn't just rely on smoking guns and witnesses - police investigators also engage with the mysterious, invisible world of forensic evidence. But what exactly is the science behind this evidence and the methods used to procure and analyse it?In this accessible and entertaining book, Sanjukta Mondal lifts the petri dish lid on this murky world, revealing how scientific methods have become essential weapons in the arsenal of the modern police. With the help of references to TV show forensics, the book explores topics such as DNA profiling and toxicology and brings in notable successes - and blunders - from the real world. This is an enlightening read, whether you're a budding Sherlock Holmes or have simply always wondered just how exactly a misplaced fingerprint or lost hair can lead to a successful prosecution.