Blood spatter refers to the pattern made by blood when it is lost by the victim or the perpetrator during and after a crime. From looking at the size and shapes of the blood droplets, it is possible to tell whether a gunshot came from in front or from behind a victim, and what type of gun was used. Round blood drops on the ground may show that the victim or perpetrator was bleeding and...
Blood spatter refers to the pattern made by blood when it is lost by the victim or the perpetrator during and after a crime. From looking at the size and shapes of the blood droplets, it is possible to tell whether a gunshot came from in front or from behind a victim, and what type of gun was used. Round blood drops on the ground may show that the victim or perpetrator was bleeding and dripping blood while moving through an area. If the drops are more tear-drop shaped, the drops probably had something giving them some velocity as they hit the ground, such as a bullet or a heavy object impacting the victim. The height above the ground where droplets are found can indicate whether the victim was standing or sitting. The patterns can also show whether the perpetrator swung a heavy, bloody object in the air. The degree to which the drops are dry can help pinpoint how long the blood has been on a surface. The link I have attached gives a lot of detail on how this type of evidence is analyzed. DNA analysis is also vital in blood/crime scene analysis although it does not fall into the blood spatter category.
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