Passive drip
Definition
A stain formed when blood falls from a source under gravity alone. The resulting drop is roughly circular; its diameter correlates with fall height and target-surface roughness.
Related terms
- Bloodstain pattern analysis (BPA)
- The scientific discipline that examines the size, shape, distribution, and location of bloodstains to reconstruct the events that produced them, addressing questions...
- IABPA
- The International Association of Bloodstain Pattern Analysts, founded 1983, which sets training standards and accreditation criteria for BPA specialists.
- Presumptive test
- A fast, low-cost, class-specific screen used to triage a caseload before instrumental work begins. Examples are Marquis reagent for opioids and amphetamines,...
- Projected pattern
- A pattern produced when blood is expelled under pressure or force exceeding gravity, as in arterial spurting, impact spatter, or cast-off from...
- Transfer stain
- A stain deposited when a wet, blood-bearing object contacts a surface and leaves an impression. Shoe soles, hands, fabric, and tools can...
Explained in
- Introduction to Bloodstain Pattern RecognitionA stain formed when blood falls from a source under gravity alone. The resulting drop is roughly circular; its diameter correlates with fall height and target-...