Tool Mark Analysis Concepts

The video tutorial covers the topic of tool marks, explaining their significance in criminalistics. It describes the types of tool marks, including indentation, abrasion, and cutting marks, and details the examination process used to analyze these marks. The tutorial also discusses the identification outcomes, such as positive, negative, and inconclusive identifications, based on the comparison of class and individual characteristics of tool marks.

What is the primary goal of tool mark examination in criminalistics?

• To assess the value of the tool

• To establish a link between a tool mark and the tool that created it

• To determine the age of the tool

• To identify the owner of the tool

Which of the following is NOT an example of a tool that can leave a tool mark?

• Hammer

• Paintbrush

• Razor blade

• Knife

What type of tool mark is created when a tool is pressed against a softer surface?

• Sliding mark

• Indentation mark

• Cutting mark

• Abrasion mark

How are abrasion marks produced?

• By pressing a tool against a soft surface

• By moving a tool parallel across a surface with pressure

• By cutting through a material

• By dropping a tool onto a surface

Cutting marks are a combination of which two actions?

• Compression and sliding

• Bending and twisting

• Scratching and rubbing

• Pressing and lifting

What is the first step in the examination of tool marks?

• Taking a photograph

• Making a cast

• Using a comparison microscope

• Observing, measuring, and describing the tool mark

What material is commonly used to make a cast of a tool mark?

• Polymeric dental paste

• Clay

• Epoxy resin

• Silicone gel

In the comparison process, where is the incriminating tool mark placed in the microscope?

• On the right side

• On the left side

• In the center

• Above the comparison mark

What does a positive identification mean in tool mark analysis?

• Tool mark cannot be identified

• Insufficient matches in individual characteristics

• Class characteristics and individual characteristics match

• Class characteristics do not match

What conclusion is drawn if class characteristics match but individual characteristics are insufficient?

• Definitive match

• Positive ID

• Negative ID

• Inconclusive