fingerprints / crime scene

Question 1

how to: photograph

Answer 1

• Takes photos from outside of the classroom moving closer to the crime scene
• Takes close up and far shots
• Photos are in sequential order
• Document evidence that is photographed (makes a list)
• Takes different angles of the crime scene
• Photos are clear and easy to see
• Photographs any possible latent evidence (fingerprints, hair, etc)
• Discusses photos with other photographers
• Lists time and dates
• Lists relevance
• Photos are in order on google drive and shared with Mrs. Vaccarino
• Gives feedback and receives feedback

Question 2

loop + characteristics

Answer 2

• one delta
• one or more ridge that enters and exits on the same side

ulnar - opens toward the pinky

radial - opens toward the thumb

Question 3

arch + characteristics

Answer 3

• no deltas
• ridges enter on one side and exit on the other

a tented arch has a spike or “tent” in the middle

Question 4

whorl + characteristics

Answer 4

• at least one ridge that tends to form a complete circuit or circle
• two or more deltas

if the line between the two deltas touches the core: plain whorl

if it doesn’t: central pocket whorl

double loop whorl: two loops on print

accidental whorl: two or more patterns (not including the plain arch), or does not fall into any of the other categories clearly

Question 5

percentages that the prints occur

Answer 5

arch: 5%
whorl: 35%
loop: 60%

Question 6

what is a delta + why its importance

Answer 6

• usually triangle shaped break in ridges
• major part of identifying print types (number)

Question 7

steps of taking a print

Answer 7

• mark boxes on a piece of paper and label (ie. pointer finger, right hand)
• press the pad of the finger onto an ink pad and then roll the finger onto its left side, and then the right
• press the left side of the finger onto the marked box on the paper, and then roll it onto the right side
• lift the finger off of the paper