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These are the three main types of blood patterns.
What is passive, transfer, and projected.
This type of spatter is characteristic of blood falling under it's own weight.
What is a passive blood drop?
This type of spatter is characterized by larger droplets from an entry gunshot wound.
What is back spatter?
A drop that is perfectly round or near round often as this impact angle.
What is an angle between 70 and 90 degrees.
This is the formula used to determine angle of impact.
What is sin-1(Width/length)= Angle of Impact
When found at the crime scene this can indicate a prolonged attack or a scene found much later.
What is clotted blood?
This type of pattern is created by weapons or objects that are flung.
What is a cast-off pattern?
This type of spatter is created by an exit gunshot wound.
What is forward spatter?
Can be determined by the tails of a blood drop.
What is the direction of blood travel.
This measured variable of blood drops indicates the speed and direction of the victim or attacker.
What is the distance between drops?
This type of spatter is characterized by a pulsating pattern and is often very heavy, with large drops of bright red blood; can sometimes be a mist.
What is arterial spray spatter?
This type of spatter is often passive drops that run along a path and show the movement of a victim or suspect.
What is a drip trail pattern?
This is the two-dimensional (on paper) representation of where the blood spatter was initiated.
What is area of convergence?
The name of the small blood drops that fly off a larger parent blood drop.
What is a satellite drop?
This surface creates more scalloped edges of a blood drop or altogether saturation.
What is porous?
This type of pattern is found when an object has been moved from a location and there is no blood found where it would be expected.
What is a void?
This type of spatter will have mixtures of high and medium velocity spatter present and usually has a very conical or circular pattern with larger droplets on one side and finer mist patterns on the other.
What is a gunshot pattern?
This is the three-dimensional calculation that shows where blood came from at a crime scene.
What is point of origin?
This height from the ground can be calculated from where the blood originated showing an AOI as 30o and the area of convergence 16 feet away.
What is 9.2 ft?
This part of a droplet indicates the direction if projected.
What is a tail?
This type of pattern is found when someone walks through blood and then leaves a bloody footprint.
What is a transfer pattern?
This type of spatter is seen when large amounts of blood collect in one area.
What is a blood pooling?
This is the angle that a drop measures 0.20 cm wide and 0.35cm long.
What is the 34.8 degrees.
As the length and width of a blood spatter droplet approach an equal value, this angle is the least accurate.
What is a 90 degree angle.