Describe how an investigator should approach marking evidence of different sizes, especially very small evidence.

Larger evidence can be directly marked. For very small evidence, if direct marking is impossible, document it with a sketch or close-up photograph and mark the packaging instead.

If clothing is collected as evidence, how should it be marked, and what precautions should be taken?

Attach a tag if possible, or mark the inside with a permanent marker. Avoid disturbing bullet holes, bloodstain impressions, and marks of wear and tear.

Explain the importance of a consistent system for marking evidence at a crime scene.

Consistency ensures that all stakeholders, from first responders to lawyers and jury, can easily understand the evidence and its context.

Crime Scene Investigation Basics Lesson Plan for 11th Grade | Free Career & Technical Education Lesson

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Objective

I can describe the basic steps of crime scene investigation.

Part 1 of 4

Warm-up video

Professor Dave Explains · 10:02Vetted channel

We don't generate video — this one is by Professor Dave Explains on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 4

Key concepts

3 concepts

1
After evidence is located, it is marked for collection and documented, because crime investigation is a continuous process until evidence is presented in the courtroom.
2
When marking evidence, investigators should not damage essential details, and if the evidence is too small to mark, they should mark the packaging with details such as serial number, nature of evidence, and location.
3
The three main objectives of packaging evidence are to avoid contamination, preserve the evidence from decay and loss, and protect the evidence from the rigors of transportation.

Part 3 of 4

Practice

7 questions

Why is it important to mark evidence at a crime scene before collecting it?

According to the video, what principle of criminal law is closely tied to the importance of accurately identifying evidence?

Part 4 of 4

Exit ticket

Quick comprehension check

“List the basic steps of crime scene investigation in the correct order.”

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Crime Scene Investigation Basics

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