Toolmark Analysis

A tool mark is any impression, scratch, or abrasion made when contact occurs between a tool and a object. 

• true 
• false

Why should an investigator not try to put the tool into the tool mark at the crime scene

• it will destroy the toolmark evidence that is there
• it will leave new evidence behind covering up the original
• contamination of the evidence
• all of these

What must first be done with impression evidence?

• make a cast using plaster or dental stone
• cut out the area with the impression
• photograph it with a ruler
• place the item that made the impression over it to see if it's a match

toolmarks result from the use of a tool against a typically softer surface/object

• true 
• false 

Toolmarks are limited only to sharp objects, like  screwdrivers and  scissors.

• True
• False

TRUE or FALSE:

Tools have major and minor surface differences that can help identify one tool impression from another.

• TRUE

• FALSE

True or False: Impressions can be both class and individual evidence?

• True

• False

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

What is the primary instrument used in forensic science to compare tool marks

• Comparison Microscope

• Compound light microscope

• electron microscope