WELCOME, DETECTIVES

1
WELCOME, DETECTIVES!

• WELCOME, FUTURE DETECTIVES
• TO THE MC DETETECTIVE TRAINING SCHOOL.

2
MISSION

• Your mission is to spend the next month learning
  how to collect evidence and solve crimes.
• Upon completion of training, you will be Crime
  Scene Investigators and solve your own case!

3
Lesson One - Scientific Method and Toolmarks

• List and describe the six steps of the scientific
  method
• Describe lab procedures and rules
• Determine who committed a crime based on the
  evidence and experimentation.

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6 STEPS SCIENTIFIC METHOD

• Identify the Problem
• Collect Information- Research
• Form a Hypothesis - Suggest a Solution
• Test Hypothesis - Experiment
• Accept or Reject Hypothesis
• Report Results - Lab Write-up

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WHY SHOULD WE USE SM?

• So experiments can be repeated
• To decrease bias
• Systematic, consistent procedure

6
TOOLMARKS

• Any impression, cut, gouge, etc. caused by a tool
  coming into contact with another object .
• Initial visual examinations will usually result
  in the identification of the type of tool used
  only.
• The specific tool used can be determined due to
  wear, nicks, and breaks to a tool as the result
  of use.
• Unique grooves are pre-etched into the metal
  portions of a tool during the manufacturing
  process. These grooves can help investigators
  identify the specific tool used to commit a crime.

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TOOLMARKING LAB

• Obtain 3 known samples and tools
• Determine which tool made the mark.
• Check answer with teacher
• Visually examine the crime scene sample.
  Determine which tool made the mark.
• Spread silly putty on the wood. Gently remove
  the putty.
• Compare the putty cast with actual tools.
• Record your answers.
• Answer lab questions