The two key properties
of blood that allow it to be a key piece of evidence are: Blood is
cohesive (behaves in a certain way when it hits a surface) and Blood travels in spherical
drops (
surface tension). The blood is common in the violent crimes like the murder,
homicide, sexual crimes, between others. Usually found in the used weapon.
Across a drop blood can decide: the DNA pathological diseases, blood group
between others.
