Tool Marks
"Man is a tool-using animal. Without tools he is nothing, with tools he is all."
-Thomas Carlyle
Tool Marks | Individual Characteristics | Hex External Drive | Impression | Abrasion |
Improvised Weapon | External Drive | Slotted Drive | Sharp Weapon | Gouges |
Class Characteristics | Square External Drive | Philips Drive | Blunt Weapon | Cut |
Surface | Casting | Mold Box |
In this unit, we are going to make and examine different kinds of tools and the marks they make.
Forensic Sciene: An Introduction- teacher edition 600/607
http://youtu.be/waibs2k4dms -tire tracks molds
http://youtu.be/ZD-KSGDFX_g -casting a tool mark
http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/tables/expanded-homicide-data-table-8 - graph on weapons used in murder
http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/tables/robbery-table-3 - graph on weapons used in robbery
http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/tables/table-21 - weapons used in robbery
LABS
dichotomous key lab
tool mark collecting and casting lab
tool mark comparisons
1) CONCEPT MAP: Create a concept map using the follow terms
a) tool marks, improvised weapon, class characteristics, individual characteristics, sharp weapon, blunt weapon, abrasion, gouge, cut, impression
b) tool mark, surface, casting, mold box, impression, external drive, hex external drive, square external drive, philips drive, slotted drive
2) What is the difference between Class Characteristics and Individual Characteristics? Define each.
3) What is Tool Mark?
a) What are Tool Marks used for in forensics? ( i.e. What is the purpose of them? Why use this method? )
b) What can create a tool mark? Give 3 examples.
4) -make a crime scene that uses tool marks, have them identify the tool by using pictures and the given information- (this would be like a mini version of the big lab, to ease them into it)
5) Pick a household tool ( hammer, screwdriver, knives etc.. BONUS POINTS FOR A CREATIVE TOOL) find 4-6 different types of this tool and create map, organizing these tools by the following:
a) Shape
b) Size ( This can be on a scale of large, medium, small OR if it gives the measurement on it put that in)
c) Label all w/ the name/brand of said item. (ex. if you chose screwdriver; What kind of screwdriver is it? i.e. Philips, Nut Driver etc..)
NOTE: remember to include a creative title for your organizer, and that it is neat.
Create a Library of Tool Marks. Use 3-5 different types of tools, and different shapes and sizes of these tools and create the following:
a) a map, organizing the tools ( see #5 for further details on how to create one of these)
b) Create the tool marks themselves ( clay works well for this). Try to get a few different angles.
c) Use the tools "in action" to create an impression. Think about the different ways you can uses a improvised weapon. ( *hint* oranges peels and skin a pretty similar, don't you think? )
d) Take pictures of everything from b) and c) and compile it into a library. ( This could be like a book, or a library of large index cards. etc..)