If you follow the yellow brick road of evidence left by prints, impressions, and markings, it can lead you to the answer you’ve been looking for all along. These three are the most common types of evidence found at crimes scenes, and both crime scene investigators (CSI) and forensic laboratory technicians must know how to properly document, collect, and analyze them.
Using forensic science to solve cases (especially cold cases) is nothing new. We’ve all heard about investigators gathering DNA samples at crime scenes or dusting for fingerprints on suspected weapons. What happens when something unusual turns up in a case? Here are three of our favorite cases that baffled even the forensic science experts. We hope that reading them will help you learn from their mistakes and help solve the next big mysterious cold case!