Forensics Impressions

Impressions may be 2D or

• 3D

• 4D

• 1D

• invisible

The #1 priority of impressions is to preserve it by first

• cleaning the area

• taking photographs

• waxing the impression

• clearing out the people

If the impression is made in dust you can

• wash it with water

• pour plaster on it

• lift the impression with adhesive sheet

• spray with fixative and take pictures

Shoe or tire marks left in soft material can be preserved with

• oil

• concrete

• plaster

• gelatin

Snow or sand impressions can sometimes be delicate so this can be sprayed on first to hold the print in place

• spray wax

• hair spray

• plaster spray

• butter spray

When comparing plaster casts and ink prints this must be done to prove they are a good match

• confirm the match by viewing it

• circling the similarities on the ink page

• make an ink pattern from the plaster cast

• asking other scientists for their opinion

Wear marks, cuts, gouges and damage to shoes can make the shoe

• guilty of the crime

• class evicence

• individual evidence

• useless evidence

This person's job is to match exemplar impressions to the crime evidence

• medical examiner

• medical doctor

• general dentist

• forensic odontologist

How many teeth do adults have including wisdom teeth?

• 32

• 20

• 28

• 18

Which of the following is NOT a type of tooth?

• sharp

• incisors

• canines

• premolars

• molars