(Dna & Blood Evidence) Test Review (Page 5 of 8) in pdf

23. The picture at right shows ( passive| projected | transfer ) bloodstains.

24. The picture at right shows ( low | medium | high ) velocity spatter.

25.

What kind of blood spatter is shown in the picture at left?

_________________________________________

What direction was the blood moving? ___________________

How can you tell? _____________________________________________

26. What is the difference between a wipe pattern and a swipe pattern? _________________________

_______________________________________________________________________________

27. Describe the difference in the bloodstain patterns for blood dropped onto porous surfaces (like paper

and cardboard) vs. blood dropped onto non-porous surfaces (like plastic or a white board).

_______________________________________________________________________________

28. The greater the impact angle, the ( more | less ) circular the blood drop will become. Blood drops at

____

will be perfectly circular.

29. At an impact angle of about ____

, the blood drop forms a long, distinctive tail.

30. Secondary splashes of blood found around parent drops are called ___________________________.

31. Blood drops from greater heights will be ( larger | smaller ) than blood drops from lower heights.

32. Name 8 things an investigator can learn from analysis of a blood spatter.

a. ____________________________________________________________________________

b. ____________________________________________________________________________

c. ____________________________________________________________________________

d. ____________________________________________________________________________

e. ____________________________________________________________________________

f. ____________________________________________________________________________

g. ____________________________________________________________________________

h. ____________________________________________________________________________

33. What is luminol and how is it used in forensic investigations? _______________________________

_______________________________________________________________________________

34. Name 2 other chemicals used to identify blood at crime scenes.

__________________________________

_______________________________________

(Dna & Blood Evidence) Test Review Page 5