Forensic Investigations - Blood Spatter Worksheet Answers Fsb09
These are tiny, mist-like stains, usually less than 1 mm. They are most commonly associated with gunshot wounds or high-speed machinery. The explosive force atomizes the blood. If a worksheet shows a photo of a fine, misty pattern on a wall, the answer is almost certainly high-velocity impact spatter.
A bloodstain has length 2.0 mm and width 1.0 mm. The distance from the convergence point to the stain is 50 cm. Calculate: a) impact angle, b) height of origin.
| Question ID (Example) | Question Summary | Correct Answer | | :--- | :--- | :--- | | Q1 | A drop falls straight down onto tile. Shape? | Perfect circle. | | Q2 | A drop hits at 15 degrees. Shape? | Long, thin ellipse. | | Q3 | Why do smaller drops travel faster? | Terminal velocity / Air resistance vs. surface tension. | | Q4 | Blood soaked into carpet vs. glass. | Carpet absorbs (wavy edges); Glass stays smooth (solid edges). | | Q5 | A bloody shoe print. Type of pattern? | Transfer (Contact). | | Q6 | An 2mm stain with a satellite spot. Force? | Medium Velocity (MV). | | Q7 | Gunshot to the torso. | Back spatter (toward shooter) & Forward spatter (away). | | Q8 | The "void" in a spatter pattern. | An object (the suspect or a piece of furniture) blocked the blood. | These are tiny, mist-like stains, usually less than 1 mm
When blood leaves the body, it immediately forms a spherical shape due to surface tension. It does not fall as a teardrop; it falls as a perfect ball. When this sphere strikes a surface, the resulting stain tells a story about the speed and direction of travel. This is the foundation of the "FSB09" curriculum: using geometry to reconstruct a sequence of events.
A comprehensive worksheet like FSB09 often includes questions about patterns that are not spherical droplets. If a worksheet shows a photo of a
The primary droplet from which satellite spatters originate.
The two-dimensional point on a surface where the lines tracked back from bloodstains intersect. Step-by-Step Calculation Guide Calculate: a) impact angle, b) height of origin
The FSB09 worksheet typically focuses on five core principles: