How large are blood stains typically when associated with low-velocity impact spatter (LVIS)?

In the context of low-velocity impact spatter (LVIS), blood stains are typically larger than 3 mm. LVIS generally occurs due to forceful impacts, such as beating or blunt force trauma, which causes blood to leave the source in relatively larger droplets. The size of blood stains produced by LVIS reflects the energy and mechanics of the impact, resulting in droplets that can range from 3 mm up to approximately 4-5 mm, depending on various factors such as the nature of the impact and the volume of blood involved.

Understanding the size of blood stains is crucial for forensic analysis, as it helps in determining the mechanism of injury and reconstructing the event that led to the blood spatter. Stains larger than 3 mm are indicative of the type of force and interaction that led to their creation, allowing investigators to draw conclusions about the circumstances of the event.

Other size ranges mentioned in the options do not align with LVIS characteristics, as they suggest smaller droplets that are more typical of high-velocity spatter or other mechanisms of blood deposition.