Forensics Chapter 11 Flashcards

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Questions and Answers

What is a cast-off pattern?

A bloodstain pattern caused by low-velocity impacts.

A bloodstain pattern created by a stationary object.

A pattern formed when blood drips into blood.

A bloodstain pattern created when blood is released or thrown from a blood-bearing object in motion. (correct)

What is forward spatter?

Blood that travels in the same direction as the source of energy or force.

What is a drip pattern?

A bloodstain pattern which results from blood dripping into blood.

What defines a contact stain?

The surface where the blood ends up after contact. Signup and view all the answers

What is high-velocity impact spatter?

A bloodstain pattern caused by a high velocity impact/force. Signup and view all the answers

What is an impact pattern?

Bloodstain pattern created when blood receives a blow or force. Signup and view all the answers

What causes low velocity impact spatter (LVIS)?

A low velocity impact/force to a blood source. Signup and view all the answers

What is medium velocity impact (MVI)?

A bloodstain pattern caused by a medium velocity impact/force. Signup and view all the answers

What is misting in blood spatter analysis?

Blood that has been reduced to a fine spray. Signup and view all the answers

What is a passive drop?

Bloodstain drop(s) created by the force of gravity. Signup and view all the answers

What is a projected blood pattern?

A bloodstain pattern produced by blood released under pressure. Signup and view all the answers

What is a satellite pattern?

Small droplets of blood that are distributed around a drop or pool of blood. Signup and view all the answers

What are spines in relation to bloodstains?

The pointed edges of a stain that radiate out from the central area. Signup and view all the answers

What is a swipe pattern?

The transfer of blood from a moving source onto an unstained surface. Signup and view all the answers

What is a transfer/contact pattern?

A bloodstain pattern created when a wet, bloody surface comes in contact with another surface. Signup and view all the answers

What is spatter?

Blood that has been dispersed as a result of force applied to a source of blood. Signup and view all the answers

Study Notes

Bloodstain Pattern Analysis

Cast-Off Pattern: Created when blood is thrown from a moving blood-bearing object, indicating directionality of blood travel upon impact.
Forward Spatter: Blood that travels in the same direction as the force causing the spatter, often seen in blunt force or gunshot incidents.
Drip Pattern: Occurs when blood drips into existing blood, creating unique patterns that can assist in forensic analysis.

Types of Blood Stains

Contact Stain: Blood transfers to a surface, indicating proximity to the source; includes features such as spines (pointed edges) for identification.
High-Velocity Impact Spatter: Resulting from high-velocity impacts, such as gunfire or machinery, creating small droplets.
Impact Pattern: Blood dispersion created by a forceful blow, leading to random smaller drips of blood.

Velocity Impact Classifications

Low-Velocity Impact Spatter (LVIS): Blood patterns created by low-velocity impacts, often consisting of larger droplets.
Medium Velocity Impact (MVI): Spatter caused by medium velocity force, typically associated with blunt force trauma.

Other Blood Stain Characteristics

Misting: Blood reduced to a fine spray from applied energy, often indicative of high-velocity incidents.
Passive Drop: Blood drip formation solely due to gravitational force, without any additional energy sources.

Patterns and Their Implications

Projected Blood Pattern: Patterns produced when blood is released under pressure, such as from an injury, particularly arterial spurting.
Satellite Pattern: Small droplets surrounding a pool of blood, indicative of the way the blood impacted the surface.
Spine: Pointed stains radiating from the center of a bloodstain, helping to determine the impact direction.

Transfer and Swipe Patterns

Swipe Pattern: Occurs when blood is transferred from a moving source to a clean surface, with feathered edges indicating direction of travel.
Transfer/Contact Pattern: Created when a bloody surface touches another surface, often retaining recognizable details of the original surface.

General Blood Spatter Characteristics

Spatter: Blood dispersed due to applied force; the resulting patterns provide insights into the nature of forces involved in the incident.

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Description

Test your knowledge with this set of flashcards focused on key terms from Chapter 11 of Forensics. Each card features critical concepts like 'Cast-Off Pattern' and 'Forward Spatter', helping reinforce your understanding of bloodstain patterns and their implications in forensic science.