Tenprint Fingerprint Collection & Analysis

Question 1

What is the most important factor in proper fingerprint collection?

Accepted Answer

Proper finger alignment

Answer

Proper finger alignment is the most important factor in fingerprint collection because it ensures that the entire fingerprint pattern, from nail edge to nail edge and from the tip to below the first joint, is captured accurately. Incorrect alignment can result in incomplete or distorted prints, making them difficult or impossible to analyze and compare effectively. This foundational step directly impacts the quality and usability of the collected print.

Question 2

Which method is commonly used for latent fingerprint collection?

Accepted Answer

Dusting with powder

Answer

Dusting with powder is a widely used and effective method for collecting latent fingerprints, especially from non-porous surfaces. The fine powder adheres to the oils and moisture left behind by friction ridge skin, making the otherwise invisible print visible for lifting and documentation. This technique allows for the recovery of crucial evidence at crime scenes.

Question 3

How should a fingerprint be positioned on the collection card?

Accepted Answer

Finger flat

Answer

Positioning the finger flat and rolling it from one side to the other ensures that the entire surface of the friction ridge skin, from nail edge to nail edge, is captured on the card. This comprehensive impression is vital for accurate analysis and comparison, as it provides all necessary ridge details. A flat, rolled print minimizes distortion and maximizes the amount of usable information.

Question 4

What is a potential cause of poor fingerprint quality?

Accepted Answer

Incorrect pressure

Answer

Applying incorrect pressure, either too much or too little, is a common cause of poor fingerprint quality. Too much pressure can cause the ridges to spread and blur, while too little pressure results in a faint or incomplete print. Achieving the right amount of pressure is essential for capturing clear, distinct ridge patterns necessary for accurate identification.

Question 5

Which type of surface is most suitable for collecting latent fingerprints?

Accepted Answer

Glass or metal

Answer

Non-porous surfaces like glass and metal are generally most suitable for collecting latent fingerprints because they do not absorb the moisture and oils left by the fingers. This allows the print residue to remain on the surface, making it easier to visualize and lift using methods like powder dusting. Porous surfaces, conversely, absorb the residue, making collection more challenging.

Tenprint Fingerprint Certification Practice Test

Tenprint Fingerprint Certification Practice Test

Tenprint Fingerprint Collection & Analysis