True stories from Australian police files. A fingerprint, DNA screening, Strange indentations and scratches. These are the things that can crack a case that seems impossible to solve. Forensic evidence can mean the difference between an unsolved case and justice for victims. Vikki Petraitis has interviewed police from Australia Forensics, fingerprints, homicide and criminal investigation units, resulting in chilling stories such as these: • the forensic evidence that identified the hit-run driver who killed a child • the investigators in the 1980s who used ‘new DNA fingerprinting’ technology to identify the killer of multiple victims • ‘Poison Ivy’, the woman who drugged and robbed lonely, vulnerable men • the Chinese student who was murdered in cold blood on the street. These fascinating cases show the key role that forensic evidence plays in solving crimes, and highlight the determination of investigators to identify the perpetrators of these crimes.