ABSTRACT
Projection mechanisms create a variety of bloodstain patterns, as shown in the taxonomy diagram in Figure 8.1. A projected bloodstain pattern is spatter created as the result of a force other than impact. Projected patterns produced with a volume of 1.0 mL or more often exhibit long spines and spatters that radiate from the central bloodstain. The spines indicate the application of force that propelled the blood against the target surface. The edges of the central stain are usually distorted and exhibit spines as compared to the minimal distortion associated with a splashed bloodstain pattern. In actual practice, splashed and projected patterns may exhibit remarkably similar characteristics. More spines will be produced when the target is close to the source of projected blood. At distances in excess of 4 feet, spines are reduced because air resistance causes the volume of projected blood to decelerate (Figures 8.2a and b).
