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15 Cards in this Set
- Front
- Back
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Common blood reagents.
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DFO
Ninhydrin Amido black Leuco crystal violet Leuco malachite green Luminol/Blue Star |
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Less known reagents.
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Acid yellow
Crowle's double stain Coumassie Blue Diaminobenzidine Fluorescein Hungarian red |
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Amido black.
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Stains the protein in blood blue-black. Can be used on porous and non porous.
Stains background of non porous. |
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Physical developer.
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May be used after amido black to improve developed prints.
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Leuco malachite green.
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Detects latent blood.
Changes to green in presence of blood. Can be used on some porous substrates such as carpet, clothing, cement. |
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Leuco crystal violet.
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Detection method for latent blood.
Color changes to purple in presence of blood. Can be used on some porous substrates such as carpet, clothing, cement, etc. |
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Luminol.
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Detects trace amounts of blood.
Reacts with iron, luminesces briefly. Very little blood needed to react. |
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Blue Star.
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Luminol based-longer lasting, easier to use.
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Bloodstain pattern definition.
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Study of the size, shape, location and pattern distribution of blood in order to provide an interpretation of the physical events that gave rise to their origin.
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Dr. Eduard PIOTROWSKI.
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Conducted BSPA experiments with live rabbits. Graphic drawings to illustrate findings.
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What can be established through BSPA?
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Minimum number of blows, strikes, etc.
Position of victim/suspect during and after bloodshed. Were articles removed after blood was shed. If an artery was cut. Distance between target and source. Point of origin. Direction of impact. Movement and direction of person, object during and after shedding of blood. |
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Behavior of blood.
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Blood is a fluid that behaves like any other fluid.
It obeys the laws of physics. Blood is subjected to gravity and air resistance once it leaves the body. |
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Three categories of pattern interpretation.
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Gravity produced, transfer and spatter.
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Satellite.
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Drops hit another drop, causing smaller drops to form. Tail is at the leading edge of the drop.
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Splash pattern.
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Large amount hits at once, usually causes lots of satellite.
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