Blood spatter
Can be analyzed to determine patterns that help determine how crime might have happened
Impact blood spatter
Bloodstain pattern created when blood receives a blow or
force resulting in the random dispersion of smaller drips of blood
Forward blood spatter
Blood which travels in the same direction as the source
of energy or force which caused the spatter
Back blood spatter
Blood directed back towards the source of energy or force
that caused the spatter.
high - velocity blood spatter
A bloodstain pattern caused by such as gunshot, explosion, machinery, velocity may be 100 ft/sec, forming drops less than 1 mm.
Area of convergence
The location of the blood surface source determined by drawing lines from the various blood droplets to the point where hey intersect - 2D
Skeletonization
Edges of a blood stain dry to the surface.
Angle of Impact
The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.
Arterial Spurting
Bloodstain pattern resulting from blood exiting the body under pressure from a breached artery
Blood Spatter Analysis
A field of forensic science that deals with the physical properties of blood and the patterns produced under different conditions as a result of carious forces applied to the source of blood
Contact Stain/transfer
Blood deposited from direct contact between two surfaces at least one of which is bloody
directionality
The direction the blood was traveling when it hit the target surface; investigators can usually establish directionality of a blood drop's flight form the geometric shape of its blood stain.
Expirated Blood
Blood that is blown out of the nose, mouth, or a wound as a result of air pressure or air flow, which is the propelling force.
Flight Path
the path of the blood drop as it moves through space, from the impact site to the target.
Flow Pattern
A change in the shape and direction of a blood stain due to the influence of gravity or movement of the object.
Impact Site
The point where force meets blood source
misting
Blood which has been reduced to a fine spray, as a result of the energy or force applied to it.
point/area of convergence
The common point (area), on a two dimensional surface, over which the directionality of several blood drops can be retraced.
projected blood pattern
A bloodstain pattern that is produced by blood released under pressure as opposed to an impact, such as arterial spurting.
target
A surface upon which blood has been deposited.
void
An absence of strains in an otherwise continuous bloodstain pattern.
bloodstain
evidence that liquid blood has come into contact with a surface
cast-off pattern
a bloodstain pattern created when blood is released or thrown from a moving blood-bearing object
direction of flight
the trajectory of a blood drop, which can be established by its angle of impact and directionality angle
drip pattern
a bloodstain pattern that results from blood dripping into blood
directionality angle
the angle between the long axis of a bloodstain and a predetermines line on the plane of the target surface that represents 0 degrees
low-velocity impact spatter (LVIS)
a bloodstain pattern caused by impact or force to a blood source; velocity may be up to about 5 ft/sec with drop size of 4 to 6 mm
medium-velocity impact spatter (MVIS)
a bloodstain pattern caused by a medium-speed impact or force to a blood source; a beating or stabbing typically causes this type of spatter, and velocity may be about 25 ft/sec with a stain generally 1 to 4 mm
parent drop
a drop of blood that casts off a wave or satellite spatter
passive drop (bleeding)
bloodstain drop created or formed by the force of gravity acting alone
point of origin
The point in space where the blood spatter came from 3D
satellite spatter
small droplets of blood distributed around a drop or pool of blood as a result of the blood hitting the target surface
spatter
blood that has been dispersed as a result of force applied to its source; a spatter pattern will cary depending on the force that created it
spine
the pointed or elongated stains that radiate from the central area of a bloodstain
swipe pattern
the transfer of blood from a moving source onto an unstained surface; the direction of travel may be determines by the feathered edge
transfer or contact pattern
a bloodstain pattern created when a wet, bloody surface comes in contact with a second surface; a recognizable image of all or a portion of the original surface may be observed in the pattern
wipe pattern
a bloodstain pattern created when an object moves through an existing stain, removing it or changing its appearance
Saturation
bloodstain resulting from the accumulation of liquid blood in an absorbent material
Formula for Angle of impact
Sin-1 w/l
Formula for Point of orgin
Tan (angle of impact) * distance to AoC
Blood drop from 90 degrees
Blood drop from 10 degrees
Blood drop from 50 degrees
Height at which blood drops do not get larger on impact
above 7 feet
Smooth edged Drop
Glass or other non-pours surfaces affect on blood drops
Lots of spines and satellites from the drop
wood or other pours surfaces affect on blood drops
Swipe
...
blood on blood
...
high
...
pool of blood
...
kastle meyer
test that confirms a red stain is blood by adding alcohol, phenolpthalien, & hydrogen peroxide --- pink color if blood
luminol
test where if blood is present, it will glow in the dark ; even if you think it has been cleaned up
Blood spatter
Can be analyzed to determine patterns that help determine how crime might have happened
Impact blood spatter
Bloodstain pattern created when blood receives a blow or
force resulting in the random dispersion of smaller drips of blood
Forward blood spatter
Blood which travels in the same direction as the source
of energy or force which caused the spatter
Back blood spatter
Blood directed back towards the source of energy or force
that caused the spatter.
high - velocity blood spatter
A bloodstain pattern caused by such as gunshot, explosion, machinery, velocity may be 100 ft/sec, forming drops less than 1 mm.
Area of convergence
The location of the blood surface source determined by drawing lines from the various blood droplets to the point where hey intersect - 2D
Skeletonization
Edges of a blood stain dry to the surface.
Angle of Impact
The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.
Arterial Spurting
Bloodstain pattern resulting from blood exiting the body under pressure from a breached artery
Blood Spatter Analysis
A field of forensic science that deals with the physical properties of blood and the patterns produced under different conditions as a result of carious forces applied to the source of blood
Contact Stain/transfer
Blood deposited from direct contact between two surfaces at least one of which is bloody
directionality
The direction the blood was traveling when it hit the target surface; investigators can usually establish directionality of a blood drop's flight form the geometric shape of its blood stain.
Expirated Blood
Blood that is blown out of the nose, mouth, or a wound as a result of air pressure or air flow, which is the propelling force.
Flight Path
the path of the blood drop as it moves through space, from the impact site to the target.
Flow Pattern
A change in the shape and direction of a blood stain due to the influence of gravity or movement of the object.
Impact Site
The point where force meets blood source
misting
Blood which has been reduced to a fine spray, as a result of the energy or force applied to it.
point/area of convergence
The common point (area), on a two dimensional surface, over which the directionality of several blood drops can be retraced.
projected blood pattern
A bloodstain pattern that is produced by blood released under pressure as opposed to an impact, such as arterial spurting.
target
A surface upon which blood has been deposited.
void
An absence of strains in an otherwise continuous bloodstain pattern.
bloodstain
evidence that liquid blood has come into contact with a surface
cast-off pattern
a bloodstain pattern created when blood is released or thrown from a moving blood-bearing object
direction of flight
the trajectory of a blood drop, which can be established by its angle of impact and directionality angle
drip pattern
a bloodstain pattern that results from blood dripping into blood
directionality angle
the angle between the long axis of a bloodstain and a predetermines line on the plane of the target surface that represents 0 degrees
low-velocity impact spatter (LVIS)
a bloodstain pattern caused by impact or force to a blood source; velocity may be up to about 5 ft/sec with drop size of 4 to 6 mm
medium-velocity impact spatter (MVIS)
a bloodstain pattern caused by a medium-speed impact or force to a blood source; a beating or stabbing typically causes this type of spatter, and velocity may be about 25 ft/sec with a stain generally 1 to 4 mm
parent drop
a drop of blood that casts off a wave or satellite spatter
passive drop (bleeding)
bloodstain drop created or formed by the force of gravity acting alone
point of origin
The point in space where the blood spatter came from 3D
satellite spatter
small droplets of blood distributed around a drop or pool of blood as a result of the blood hitting the target surface
spatter
blood that has been dispersed as a result of force applied to its source; a spatter pattern will cary depending on the force that created it
spine
the pointed or elongated stains that radiate from the central area of a bloodstain
swipe pattern
the transfer of blood from a moving source onto an unstained surface; the direction of travel may be determines by the feathered edge
transfer or contact pattern
a bloodstain pattern created when a wet, bloody surface comes in contact with a second surface; a recognizable image of all or a portion of the original surface may be observed in the pattern
wipe pattern
a bloodstain pattern created when an object moves through an existing stain, removing it or changing its appearance
Saturation
bloodstain resulting from the accumulation of liquid blood in an absorbent material
Formula for Angle of impact
Sin-1 w/l
Formula for Point of orgin
Tan (angle of impact) * distance to AoC
Blood drop from 90 degrees
Blood drop from 10 degrees
Blood drop from 50 degrees
Height at which blood drops do not get larger on impact
above 7 feet
Smooth edged Drop
Glass or other non-pours surfaces affect on blood drops
Lots of spines and satellites from the drop
wood or other pours surfaces affect on blood drops
Swipe
...
blood on blood
...
high
...
pool of blood
...
kastle meyer
test that confirms a red stain is blood by adding alcohol, phenolpthalien, & hydrogen peroxide --- pink color if blood
luminol
test where if blood is present, it will glow in the dark ; even if you think it has been cleaned up