What type of stains are created by drips and flows?

Passive stains are the result of the natural forces of gravity acting on liquids, leading to dripping or flowing patterns on a surface. These stains typically occur when a liquid, such as blood, falls due to gravity without any forceful impact or action. Instead, they are characterized by their uniform appearance and predictable shape, as they create distinct drips or pools on surfaces below.

In contrast, impact stains arise from the force of an object striking a liquid, resulting in various patterns of splatter. Wipe patterns occur when a surface is intentionally or unintentionally wiped, which disrupts the fluid and creates a different pattern. Splash patterns are formed when a liquid is propelled into the air, often resulting in a more chaotic dispersion of droplets.

Understanding passive stains is crucial in crime scene investigation, as they can provide valuable information about the position of the victim, the timing of events, and the nature of the injuries sustained. The patterns they create can help investigators reconstruct the scene accurately.