Term
| ____ is the method used to support a likely sequence of events at a crime scene by the observation and evaluation of physical evidence and statements made by individuals involved with the incident |
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Definition
Crime-scene Reconstruction |
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Term
| Reconstructing the circumstances of a crime scene is a team effort that may include the help of law enforcement personnel, medical examiners, and ____ |
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Definition
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Term
| Violent contact between individuals at a crime scene frequently produces bleeding and results in the formations of ____ |
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Definition
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Term
| he proper interpretation of bloodstain patterns necessitates carefully planned ____ using surface materials comparable to those found at the crime scene |
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Definition
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Term
- Bloodstain patterns may convey to the analyst the location and movements of ____ or ____ during the commission of a crime
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Definition
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Term
| T or F: Harder and less porous surfaces result in less spatter, whereas rough surface result in stains with more spatter and serrated edges |
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Definition
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Term
| Generally, bloodstain diameter (increases, decreases) with height |
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Definition
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Term
| The ____ and ____ of blood striking an object may be discerned by the stain's shape |
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Definition
Direction of Travel / Angle of Impact |
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Term
| A drop of blood that strikes a surface at an angle of impact of approximately 90 degrees will be close to (elliptical, circular) in shape |
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Definition
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Term
The angle of impact of an individual bloodstain can be estimated using the ratio of ____ divided by ____
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Definition
Width of the Bloodstain / Length of the Bloodstain |
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Term
| ____ is the most common type of blood spatter found at a crime scene and is produced when an object forcefully contacts a source of blood |
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Definition
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Term
| T or F: Forward spatter consists of the blood projected backward from the source, and back spatter is projected outward and away from the source |
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Definition
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Term
| The classification system of impact spatter is based on the size of drops resulting from the velocity of the blood drops produced, and patterns can be classified as ____, ____, or ____ impact spatter |
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Definition
Low Velocity / Medium Velocity / High Velocity |
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Term
| T or F: The velocity classification system is a good way to classify impact patterns and to determine the kind of source that produced them |
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Definition
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Term
| The ____ is the point on a 2 dimensional plane from which the drops originated |
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Definition
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Term
| The ____ of a bloodstain pattern in a three dimensional space illustrates the position of the victim or suspect when the stain producing even took place |
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Definition
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Term
| The ____ method is used at the crime scene to determine the area of origin |
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Definition
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Term
| A(n) ____ is created by contact between a bloody object and a surface |
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Definition
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Term
| Movement of a bloody object across a surface (lightens, darkens) as the patter moves away from the point of contact |
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Definition
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Term
| T or F: Footwear transfer patterns created by an individual who was running typically show imprints with more space between them compared to those of an individual who was walking |
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Definition
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Term
| T or F: The direction of a flow pattern may show movements of objects or bodies while the flow was still in progress or after the blood had dried |
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Definition
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Term
| The approximate drying time of a(n) ____ of blood determined by experimentation is related to the environmental condition of the scene and may suggest how much time has elapsed since is deposition |
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Definition
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Term
| The edges of a bloodstain generally ____ within 50 seconds of deposition and are left intact even if the central area of a bloodstain is altered by a wiping motion |
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Definition
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Term
| A(n) ____ pattern commonly originates from repeated strikes from weapons or fists and is characterized by an arc pattern of separate rips showing directionality |
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Definition
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Term
| T or F: Characteristics of a cast off pattern arc cannot give clues as to the kind of object that was used to produce the pattern |
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Definition
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Term
| When an injury is suffered to an artery, the pressure of the continuing pumping of blood projects blood out of the injured area in spurts creating a pattern known as ____ |
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Definition
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Term
| If a(n) _____ pattern is found at a scene, it may show movement, lead to a discarded weapon, or provide identification of the suspect by his or her own blood |
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Definition
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Term
| A bloodstain pattern created by ____ fears bubbles of oxygen in the drying drops and may be lighter in color when compared to impact spatter |
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Definition
Blood Expelled From the Nose or Mouth |
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Term
| The shape and size of the blank space, or ____, created when an object block the deposition of spatter onto a surface and is then removed may give a clue as to the size and shape of the missing object or person |
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Definition
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Term
| T or F: Each bloodstain pattern found at a crime scene should be noted, studied, and photographed |
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Definition
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Term
| When documenting bloodstain patterns, the ____ involved setting up a grid of squares of known dimensions over the entire pattern and taking overview, medium range, and close up photographs with and without the grid |
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Definition
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Term
| The ____ method of bloodstain documentation involved setting up a border of rulers around the patterns and then placing a small ruler next to each stain to show relative position and size in photographs |
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Definition
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Term
| T or F: The pointed end of a bloodstain always faces toward its direction of travel |
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Definition
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