Abstract
Many different types of evidence, such as urine, blood, and stomach contents, are collected during the forensic examination. Blood is a type of biological evidence that is collected and stored for further investigation. Forensic analysis is highly dependent on blood evidence. Blood collection, preservation, documentation, and testing are essential to the overall success of the casework. Because there may be a combination of body fluids or epithelial compounds in objects, a person's blood test is necessary in most cases. There are two types of blood found at the scene: dried blood stains and water droplets. Dry blood can be mixed with 0.9 percent common salt. This review article discusses how to remove dried blood stains and what issues are currently being discussed in the intelligence community. Keywords: evidence, epithelial compounds, dry and wet blood, body fluids
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