Bloodstains can be key evidence to a crime because the patterns can be as unique as finger prints by giving direction, height and angel of the blood spatter. Since no one in the world has the same DNA you could figure out exactly who the blood came from and if you know where the killer or victim was you could triangulate the position of the crime. It also can give you a time frame for the crime by the way the blood coagulates and dries.
There are three types of bloodstains passive stains, transfers stains and impact stains. Passive stains are just gravity reacting with blood and naturally pooling from a wound or falling. Transfer stains come from a bloody object interacting with another object that causes the blood to be transferred for
There are three types of bloodstains passive stains, transfers stains and impact stains. Passive stains are just gravity reacting with blood and naturally pooling from a wound or falling. Transfer stains come from a bloody object interacting with another object that causes the blood to be transferred for