Fingerprinting Unit

What is the purpose of dactylography?

• to study fingerprints

• to help identify suspects at a crime scene

• for identification purposes

• used to determine genetic relationships

Where does fingerprint residue come from?

• the glands that produce oil and sweat

• the ridges on the skin

• the valleys on the skin

• hair follicles on the hands and feet

The FBI has found that no two people share more than 12 minute details in common

• True

• False

There are successful methods of removing one’s fingerprints permanently

• True

• False

This type of print may be left behind in wax or clay

• Patent

• Latent

• Plastic

These fingerprints are visible at a crime scene due to being left in a liquid substance

• Patent

• Latent

• Plastic

This chemical binds to the carbohydrates in latent prints and turns them brown

• Ninhydrin

• Cyanoacrylate Vapor

• Silver Nitrate

• Iodine Fuming

This chemical binds with salts in our sweat and turns them black or red-brown.

• Ninhydrin

• Cyanoacrylate Vapor

• Silver Nitrate

• Iodine Fuming

 This chemical binds to amino acids in sweat and turns the print a purple-blue.

• Ninhydrin

• Cyanoacrylate Vapor

• Silver Nitrate

• Iodine Fuming

1. When it comes to entering a crime scene, what statement is FALSE?

• 1. Always wear gloves at the crime scene

• Never use a cloth to pick up evidence so you don’t destroy fingerprints

• Always package latent fingerprints found on documents between two pieces of cardboard

• Never add more fingerprints to a crime scene