Blood Spatter.

Slides:

Advertisements

Similar presentations

Blood splatter analysis

Advertisements

Forensic Characterization of Bloodstains

Blood Spatter Analysis torial.htm.

Blood Spatter Analysis. Blood Sample Collection Methods Swab – Use a web swab to transfer the blood onto the swab (must allow it to dry!) Scrape – Use.

Blood Forensics CHS Forensics. Blood Volume On average, blood accounts for 8% of a persons total body weight 5 to 6 liters of blood for males 4 to 5 liters.

Chapter Ten – Bloodstain Pattern Analysis FRSC 8104 Criminalistics II Professor Bensley.

Blood Spatter Analysis. General Rules  Directionality of a blood drop while in flight is usually obvious from the geometry of its resulting bloodstain.

Serological tests By: Deshanie Govender.

Blood Part II – Spatter.

Bloodstain Terminology WARNING Contains graphic images.

BLOODSTAIN PATTERNS. BLOOD COMPONENTS Plasma fluid portion of normal unclotted blood red blood cells, white blood cells, and platelets are suspended in.

Blood Spatter Evidence It is a field of forensic investigation which deals with the physical properties of blood and the patterns produced under different.

Forensic Science Lab Activity. Please see Blood Spatter Labs 1 & 2.

Bloodstain Evidence May reveal: Origin(s) of bloodstain Distance of bloodstain from target Direction from which blood impacted Speed with which blood.

Blood Spatter Analysis

Bloodstains Pattern Analysis

BLOOD SPATTER ANALYSIS CP Forensics Alvarado.

Bloodstain Evidence May reveal:

BLOODSTAIN PATTERN ANALYSIS

F5 Press F5 on the keyboard to start the slideshow.

Unit 5 Blood 5.4 Blood Droplets. Blood Droplet Characteristics A blood droplet will remain spherical in space until it collides with a surface Once a.

Blood spatter analysis

Daily Trivia Women blink nearly twice as much as men.

Bloodstains A field of forensic investigation that deals with: – physical properties of blood –patterns produced by forces being applied to blood Blood,

Serology III Bloodstain Pattern Analysis. Forwards Backwards.

Blood patterns at a crime scene. Why it is important A basic understanding of blood spatter analysis allows first responding officers and investigators.

Drip 1: Blood dripping into itself from height of 1 m (8 drops) 38.

BLOODSTAIN PATTERN ANALYSIS TUTORIAL

Recognition of Bloodstain Patterns. History of Bloodstain Use Over 550 research articles have been written concerning bloodstain patterns and their use.

FORENSIC SCIENCE Serology These are useful terms in determining the bloodstain pattern 1.

Original presentation by Detective Gregory Restina

Bloodstain Pattern Analysis

By Ronnie Graves.

Prof. J. T. Spencer Adjunct Prof. T. L. Meeks

Bloodstain Pattern Analysis

Blood Spatter Analysis

5.2: BLOOD TESTS & SPATTER ANALYSIS

Blood Spatter in Forensics

5.4 Blood Spatter Patterns

BLOODSTAIN PATTERN ANALYSIS TUTORIAL

Blood Spatter Analysis

Blood Spatter Pattern Analysis

Blood Found at Crime Scene

FORENSIC SEROLOGY Forensic serology involves the detection, classification and study of various bodily fluids such as blood, semen, perspiration, and.

Blood Spatter In 1939 the meaning of the spatter pattern was first analyzed. When a wound is inflicted, a blood spatter pattern may be created. It takes.

Blood Spatter Analysis

A field of forensic examination of the shapes, locations, and distribution patterns of bloodstains, in order to provide an interpretation of the physical.

Blood in Flight Notes 3.2.

Blood Spatter Analysis

Forensic Characterization of Bloodstains

Bloodstain Pattern Analysis

Blood Part II – Spatter.

Definitions of Key Bloodstain Pattern Analysis Terms

Forensic Serology BLOOD SPATTER.

Blood splatter analysis

Bloodstain Pattern Analysis… Bloodspatter

Blood Spatter Analysis

Blood Spatter Analysis

Blood – a Liquid Blood is nothing more than a liquid

Cast-off Pattern A bloodstain pattern created when blood is released or thrown from a blood-bearing object in motion.

Where did the blood come from?

Blood Part II – Spatter.

Presentation transcript:

Blood Spatter

Categories of Bloodstains PASSIVE TRANSFER PROJECTED

TARGET SURFACE TEXTURE Bloodstains can occur on a variety of surfaces. The type of surface the blood strikes affects the amount of resulting spatter, including the size and appearance of the blood drops.

Blood droplets that strike a hard smooth surface, like a piece of glass, will have little or no distortion around the edge.

Blood droplets that strike linoleum flooring take on a slightly different appearance. Notice the distortion (scalloping) around the edge of the blood droplets.

Surfaces such as wood or concrete are distorted to a larger extent Surfaces such as wood or concrete are distorted to a larger extent. Notice the spines and secondary spatter present.

LARGE VOLUMES OF BLOOD (patterns created by same volume of blood, from same source to target distance) "Dripped Blood"

"Spilled Blood"

"Projected Blood" (through syringe)

Projected Bloodstains *Arterial Spurt / Gush Bloodstain pattern(s) resulting from blood exiting the body under pressure from a breached artery:

*Cast-off Stains Blood released or thrown from a blood-bearing object in motion:

Impact Spatter

Low Velocity Gravitational pull up to 5 feet/sec. Relatively large stains 4mm in size and greater

Preponderant stain size 1 to 4mm in size Medium Velocity Force of 5 to 25 feet/sec. Preponderant stain size 1 to 4mm in size

High Velocity Force of 100 feet/sec. and greater Preponderant stain size 1mm in size and smaller Mist like appearance

Test Your skills!! The following images are from a real case. A landlord found blood all over the hallways leading up to apartment 203. Analyze the blood spatter and see what you can get from it.