The significance of fingerprints in investigative procedures and in court is unparalleled. The dactyloscopic trace remains the only evidence that allows for a definitive identification of the perpetrator. Its evidential value is not even matched by the so-called genetic fingerprint, which is DNA analysis. This book outlines the tools and methods that enable evidence collectors to select and apply the best and most suitable techniques. It aims to demonstrate the possibilities of dactyloscopic trace search and preservation to investigators and support them in their work. After a brief introduction to crime scene work and dactyloscopy, various evidence preservation methods are presented and explained in detail. The range covers dusting powders, superglue, and various chemical solutions used to secure fingerprints.