What produces medium-velocity impact spatter?

Medium-velocity impact spatter is typically produced by forces that are exerted at speeds ranging from 5 to 25 feet per second. This type of spatter often arises from events such as blunt force trauma, where the speed of the force impacts the surface of blood, causing it to scatter and create distinct patterns.

The correct range of force indicates that the energy transfer during such an impact is sufficient to create a splash of blood droplets, which are generally larger than those created by high-velocity impacts (like gunshots) and smaller than those created by low-velocity impacts. Understanding this velocity range helps in analyzing crime scenes, as forensic investigators can determine the nature of the force involved in the blood spatter patterns, providing crucial information about the events that occurred during an incident.

In contrast, natural body movement typically produces minimal spatter and often results in different patterns. Low force impacts do not generate sufficient energy to produce significant spatter, and high-velocity weapons create fine mist-like droplets that belong to a different category altogether. Therefore, recognizing the correct velocity range is essential for accurate forensic analysis.