One of the most important pieces of evidence on crime scene is the blood stains which may not always be visible. Used for revealing invisible blood stains, Luminol makes contributions to resolution of criminal cases. In this study, three different cases were examined in the City of Samsun, Turkey, and remarkable results have been revealed. Two cases happened in the year of 2008 and the other one in 2009. In the two cases, Luminol revealed how a criminal act was actually committed and confirmed the statements of suspects and witnesses. In the other case however, the Luminol contradicted the suspect’s statement and proved that the criminal act was actually done by the suspect. All of these three cases have revealed the importance of blood stains during a crime scene investigation.
