Name:
Date:
Pd;
Gd:
FS  
Lab #: ____ Blood Spatter Pattern Analysis (modified from Syracuse & Wards labs)-part 1
Introduction:
Pre-lab Questions 
1- What 3 pieces of information
does the bloodstain pattern
investigator aim to understand in a
crime scene investigation?
2-What are some other types of
evidence gathered at a crime
scene?
3-How is bloodstain evidence
collected at a crime scene? What’s
the reason for this?
Procedure:
1. Tape a sheet of white paper to the cardboard to make a whiteboard.
2. Lay the whiteboard flat on the floor. Drop several samples of “blood” using a pipette at a height of 1 inch, 12
inches, 36 inches and 60 inches. This represents blood dropping from an object/person who is not moving,
horizontal or at an impact angle of 90 degrees. Accurately and neatly sketch the drop formations in the
appropriate box on the data table. Include all satellite spatter if necessary.
3. Repeat step 2 but adjust the angle of the whiteboard (you may need clean white paper-use scrap paper-reduce,
reuse-recycle- ) but adjust the angle of the whiteboard using the protractor to 15 degrees above the horizon
(75 degree angle of impact). This will represent blood dropping from an object/person who is moving at a slow
to moderate pace.
4. Repeat this process again but adjust the whiteboard to 30, 45, 60 and 75 degrees. This will represent blood
dropping from an object/person who is moving at an increasingly quicker pace. You should have a total of 24
blood spatter sketches.
Conclusion:
1.
Describe the pattern of blood spatter as impact angle decreased (pace increased).
2. What does the tail of a blood drop in a spatter tell you?