Blood spatter patterns murder or self defense
This presentation is the property of its rightful owner.
Sponsored Links
1 / 32

Blood Spatter Patterns Murder or Self Defense? PowerPoint PPT Presentation


  • 114 Views
  • Uploaded on
  • Presentation posted in: General

Blood Spatter Patterns Murder or Self Defense?. Chris Schaefer, OMS II Priya Nileshwar , OMS I Nnaemeka Diribe , OMSI. Types of Patterns. High Velocity. Medium Velocity. Low Velocity. How can we find out where the blood came from?. Pattern Analysis.

Download Presentation

Blood Spatter Patterns Murder or Self Defense?

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Blood spatter patterns murder or self defense

Blood Spatter PatternsMurder or Self Defense?

Chris Schaefer, OMS II

PriyaNileshwar, OMS I

NnaemekaDiribe, OMSI


Blood spatter patterns murder or self defense

Types of Patterns


Blood spatter patterns murder or self defense

High Velocity


Blood spatter patterns murder or self defense

Medium Velocity


Blood spatter patterns murder or self defense

Low Velocity


Blood spatter patterns murder or self defense

How can we find out where the blood came from?


Pattern analysis

Pattern Analysis

Select drops of blood with an easily identifiable shape

Measure length and width of droplet


Pattern analysis1

Pattern Analysis

Divide width by length

This gives you the sine of the angle at which the blood impacted the wall


Pattern analysis2

Pattern Analysis

Measure angle with protractor and attach a string next to the droplet at angle of impact

Where all the strings come together gives location of source of blood


Which drops are good

Which Drops are Good?


Blood spatter patterns murder or self defense

Good!


Which drops are good1

Which Drops are Good?


Blood spatter patterns murder or self defense

Bad!


Measure length and width

Measure Length and Width


Divide length by width

Divide Length by Width

Width

Length


Determining angle

Determining Angle

This will give you a decimal number

The actual formula (for those of you with a little bit of Trigonometry) is arcsin(number)=angle


Blood spatter patterns murder or self defense

Math?!? Say What?


Determining angle1

Determining Angle

We can just estimate with this table

.1 = 6 degree angle.2 = 11 degree angle.3 = 17 degree angle.4 = 24 degree angle.5 = 30 degree angle.6 = 37 degree angle.7 = 45 degree angle.8 = 53 degree angle.9 = 64 degree angle1 = 90 degree angle


Measure angle and string

Measure Angle and String


Area of convergence

Area of Convergence


Blood spatter patterns murder or self defense

Case

How can we know if a killing was due to self defense or murder?


Story

Story

Stewie states that he was defending himself against Brian who was coming after him with a knife. Both of them were standing when this happened. Stewie says he struck Brian in the head while he was still standing.


Evidence

Evidence


Blood spatter patterns murder or self defense

Is he telling the truth?


High or low velocity

High or Low Velocity ?


Good or bad pattern

Good or Bad Pattern?


Good pattern must have a tail true false

Good Pattern must have a tail.True/False?


  • Login