Bloodstain Pattern Analysis

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Bloodstain Pattern Analysis by Mind Map: Bloodstain Pattern Analysis

1. Components of a Bloodstain

1.1. Direction of impact

1.2. Angle of impact

1.3. Nature of the force

1.4. Relative position of related objects/persons

1.5. Probable distance from origin

1.6. Sequencing of multiple events in the incident

2. Droplet Size & Force

2.1. Gunshot

2.1.1. High energy

2.1.2. Small diameter droplets

2.1.3. High-velocity spatter

2.2. Medium-velocity

2.2.1. Caused by medium force event

2.2.1.1. Stabbing

2.2.1.2. Beating

2.2.2. Stains ranging from 1 - 4 mm in diameter

2.3. Low-velocity

2.3.1. Low-force event

2.3.1.1. Nose bleed

2.3.1.2. Bleeding wound dripping

2.3.2. Large diameter stains & droplets

2.3.2.1. >4mm

3. Types of Bloodstains

3.1. Passive stains

3.1.1. Force of gravity

3.1.2. Drips

3.1.3. Splashes

3.1.4. Flows

3.1.5. Pools

3.2. Impact spatter stains

3.2.1. Backward spatter

3.2.2. Forward spatter

3.2.3. Results from impact with objects

3.3. Transfer stains

3.3.1. Wipes

3.3.2. Swipes

3.3.3. Contact transfer

3.3.4. Object moving through preexisting bloodstain

3.4. Latent stains

3.4.1. Require chemical enhancements

3.4.2. Not very visible

3.5. Others

3.5.1. Cast-off

3.5.1.1. Released from surface of bloody object in motion

3.5.2. Projected

3.5.2.1. Arterial spurts/gushes

3.5.3. Expirated

3.5.3.1. Expelled from mouth/hose/wound from application of air pressure

4. Photogrammetry & 3D Reconstruction

4.1. 3D Scanning to record crime scene

4.1.1. Forensic package can be used to analyze scene

4.1.2. 2D/3D Mapping via scanner reconstruction

4.2. Does not replace traditional measurements (supplemental)