What speed is considered high velocity impact spatter?

High velocity impact spatter refers to blood droplets created when a significant force impacts a blood source, resulting in fine droplets that can travel a considerable distance from the source. The standard measurement for identifying high velocity impact spatter is typically established at speeds above 100 feet per second. At this velocity, the blood is atomized into small droplets, which can then be distributed over a wider area, indicating a more violent or forceful impact.

This distinction is critical in crime scene investigation because the presence and pattern of such spatter can provide insights into the nature of the incident, including the type of weapon used or the dynamics of an altercation. Therefore, recognizing that high velocity spatter is defined at over 100 feet per second is essential for accurate analysis and interpretation of blood evidence at crime scenes.