What is 'blood-stain convergence' and how is it studied in CSI?

What is 'blood-stain convergence' and how is it studied in CSI?

Blood-stain convergence is a form of blood-stain pattern analysis, and it allows us to make a determination as to the origin of a stain pattern. Often at crime scenes when there is bleeding, there is a lot of movement; movement on the part of the perpetrator, perhaps even movement on the part of the victim. The convergence protocol procedure allows the blood-stain pattern analyst to ascertain the point of origin or area of origin of a series of blood-stains.