Exam 17: Tool Marks

Abrasion marks are made by objects, which include:

Tools have unique characteristics due to manufacturing processes and use over time.

​Saw marks left on bones vary by the type of saw used.What type of saw leaves teeth-mark patterns of a tiny tick-tac-toe board with thousands of squares?

If it is possible, tool mark evidence should be collected and preserved for analysis.If this is not possible, _____________________________ is a commonly used method of preserving impressions of tool marks.

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

There is more than one category of tool marks.Tool mark categories include:

Types of casting materials include:

Crime scene tool marks and suspect tools are never fitted together to show a match.This would damage the integrity of the evidence.

An important feature of tools used in identification are serial numbers.A serial number is a unique number assigned to an object for:

Research projects at the Department of Energy's Ames Laboratory in Iowa State University include building a tool mark image database and developing an algorithm to statistically analyze the images.

A mark or impression made by a tool when it is pressed against a softer surface is:

The type of saw blade used to dismember a body can be determined by examining the cut surface of the flesh.

Any impression, scratch, or abrasion made when contact occurs between an object, such as a tool, and another object is:

The best way to document tool and tool mark evidence is to use:

In the Richard Crafts case study, it was theorized that Richard Crafts was facing a financially disastrous divorce and had decided to kill _____________________________________ upon her return from Germany.

All evidence must be correctly labeled and processed.Important information that must be recorded includes:

While photographing and recording tool mark evidence, the expert searches the surface of the tool mark for bits of foreign material using:

In his book entitled Dead Men Do Tell Tales, Dr.William Maples describes a collection of bones belonging to the C.A.Pound Human Identification Lab in Florida.These bones were the bones of:

​Historically, magnesium ribbon was burned to produce a white, powdery film of magnesium oxide to coat the surface of a tool.This technique was used to:

After tool mark comparisons are scientifically analyzed, the expert tool mark witness prepares a ____________________________________________ to present to a jury.