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Blood Spatter Evidence

Angle of Impact the acute angle formed between the direction of a blood drop and the plane of the surface it strikes
Arterial Spurting blood pattern(s) resulting from blood exiting the body of under pressure from a breached artery
Back Sputter blood directed back toward the source of energy or force that caused the spatter
Blood Spatter Analysis field of forensic science that deals with physical properties of blood and the patterns produces under different conditions as a result of various forces applied to the source of blood
Bloodstain evidence that liquid blood has come into contact with a surface
Cast Off Pattern a bloodstain pattern created when blood is thrown from a moving blood bearing object
Contact Stain blood deposited from direct contact between two surfaces, at least one of which is blood
Direction of Flight the trajectory of a blood drop, which can be established by its angle of impact and directionality angle
Directionality the direction the blood was traveling when it hit the target surface; established from the geometric shape of a bloodstain
Directionality Angle the angle between the long axis of a bloodstain and a predetermined line on the plane of the target surface that represents 0 degrees
Draw-back Effect blood in the barrel of a firearm that has been drawn backward into the muzzle
Drip Pattern a bloodstain pattern that results from blood dripping into blood
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 travels through space from the impact site to the target
Flow Pattern a change in the shape and direction of a bloodstain due to the influence of gravity or movement of the object
Forward Spatter blood that travels in the same direction as the source of energy or force that cause the spatter
High-Velocity Impact Spatter(HVIS) bloodstain pattern caused by a high speed impact or force to a blood source, such as that produced by gunshot
Impact Pattern bloodstain pattern created when blood receives a blow or force resulting in the random dispersion of smaller drops of blood
Impact Site the point where meets a blood source
Low-Velocity Impact Spatter(LVIS) a bloodstain pattern caused by a low-speed impact or force to a blood
Medium-Velocity Impact Spatter(MVIS) a bloodstain pattern caused by a medium-speed impact or force to a blood source; a beating or stabbing type of spatter
Misting blood that has been reduced to a fine spray as a result of the energy or force applied to it
Parent Drop a drop of blood that casts off a wave or satellite spatter
Passive Drop bloodstain drop(s) created or formed by the force of gravity alone
Area of Origin the common area of a 3-D space to which the trajectories of several blood drops can be retraced
Area of Convergence the common area on a 2-D surface, over which the directionality of several blood drops can be retracted
Projected Blood Pattern a bloodstain pattern produced by blood released under pressure, such as arterial spurting, as opposed to by an impact
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 vary 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 surface onto an unstained surface; direction is determined by the feathered edge
Target surface on which blood has been deposited
Transfer or Contact Pattern 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
Void an absence of stains; reverse shadow
Wipe Pattern bloodstain pattern created when an object moves through an existing stain removing or changing its appearance
Created by: dabbietz98