In crime scene investigation, when blood collected on a level, undisturbed surface, it is considered a ____

• A. Clot
• B. Drop
• C. Pool
• D. Flow

Answer: (C)

When blood lands on a flat, level surface without being disturbed, it tends to spread outward and remain in place, forming a rounded, somewhat defined area rather than separate drops or a moving trail. This spreading creates a pooled stain, driven by gravity and surface tension until the liquid comes to rest. A clot is a coagulated mass formed inside the body and isn’t about a deposited stain on a surface, a single drop describes an individual discrete droplet, and a flow implies movement or displacement across the surface, producing streaks or lines. So the best description for blood collected this way is a pool.