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Description

Plan and undertake experiments or research in two of the following areas. Show you understand the science behind what you have done.
(b) Crime Scene Investigation – find out what happens when a crime is being investigated.

Resources

Cocoa Powder
Talcum powder should be used on dark surfaces.

Instructions

Fingerprints must be removed and transported to the
crime lab. They are then compared to the database
of fingerprints on file. One way that detectives locate
fingerprints is by dusting for them. Fingerprints
are coated with powder, then lifted and taken for
identification at the lab.

What to do:
- When fingers are oily or sticky, you get better
fingerprints.
- So press an oily or sticky finger on the side of a
drinking glass.
- Coat the fingerprints with a dusting of cocoa powder.
- Brush gently with either a fiberglass brush.
- The fingerprints remain.
- Place the sticky side of the tape on the dusted
fingerprint.
- Lift on the tape and place it on light-colored
construction paper.

Tags

• crime scene investigation
• fingerprints
• Guide
• Guide Science Investigator
• interest badge
• Trefoil News
• Trefoil News 2023
• Trefoil News Winter 2023

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