Why are blood stains studied in CSI?

Why are blood stains studied in CSI?

Richard Saferstein (Former Chief Forensic Scientist) gives expert video advice on: What is blood made of?; How does the classification of blood type help in CSI?; Why are blood stains studied in CSI? and more...

Blood stains are studied for a number of reasons. Perhaps one important reason is to make a determination as to the DNA composition of the blood stain. Another important purpose of blood stain analysis is that when blood hits an object it forms a pattern and the patterns can be very important in reconstructing what occurred at a crime scene. How many blows an individual was subjected to, or what movement a victim undertook during the commission of a crime or a perpetrator. These are all questions that can be perhaps answered by studying the blood stain patterns that are present at crime scenes.