Fundamentals of Fingerprinting

Knowledge of proper techniques. Awareness of good quality

fingerprints, which include clarity and pattern recognition.

Practice.

Preparation

Prior to recording an individual’s fingerprints on a LiveScan Unit , the operator should take a couple of minutes and perform a few pre-printing operations.

Preparation The individual being fingerprinted should

stand directly in front of the LiveScan unit, approximately a forearm’s length away.

The printing surface of the platen should be from 39 to 42 inches from the floor.

In most cases the individual should stand to the right of the operator. This will enable the operator to control the individual’s movement. (DEMO)

Preparation

The operator should not allow the person to “help” while taking the fingerprints.

The person’s fingers should be held with both hands. One hand should hold the tip of their finger, while the other hand holds the middle joint of their finger. ( DEMO)

Preparation If the image appears to be too dark,

check for perspiration or try using less pressure.

If the image appears to be too light, increase the pressure slightly, or try using the “Optimize/Contrast” tab.

If the image is still too light, use a PreScan block.(DEMO)

Recording the Images

The operator will record the fingerprints in the following manner:

Slaps or Plain impressions Right Thumb Right Four fingers Left Thumb Left Four Fingers

Recording the Slaps Place the Right

Thumb on the Platen

(DEMO)

Recording the Slaps

The slaps or plain impressions should be taken as straight up and down as possible. (DEMO)

Recording the Slaps

When recording the slaps, the operator should avoid “cutting” off the tops of the fingers.

Ideally, you should see the impressions and the first crease.

(DEMO)

Recording the Slaps

The impressions SHOULD NOT look like this

(DEMO)

Recording the Slaps

If the individual has large hands it may be necessary to angle the fingers SLIGHTLY to fit them in the box

The angle SHOULD NOT be more than 30 degrees.

If the angle is too severe, this may cause false sequencing errors.

Recording the Slaps

Avoid severe angles(DEMO)

T.I.F.O.

Remember the acronym

T.I.F.O. Thumbs In Fingers Out

Fingerprinting Techniques The Thumbs of the person being

fingerprinted should be rolled In towards their body

The Fingers should be rolled Out or away from their body.

This movement allows the fingers to be rolled from an awkward position to a comfortable position.

Recording Rolled ImpressionsPosition Finger on Cross Hair

Recording the Rolled Impressions After centering, rock the finger

backward either right or left until the outer edge of the finger is visible.

(DEMO)

Recording Rolled ImpressionsRock Back on Finger

Recording the Rolled Impressions Step on the foot

pedal, when you hear the beep, begin to roll the finger on the platen.

Continue rolling until you reach the opposite side of the finger.

Recording the Rolled Impressions When the roll is

completed, roll the finger backwards slightly. This will stop the camera.

This is the Rock and Roll method.

Roll the remaining fingers in this manner.

Recording the Rolled Impressions

When rolling the fingers, the finger should be rolled completely from one side to the other.

This technique is called Nail to Nail.

Another acronym to remember is N2N

Recording the Rolled Impressions

Another acronym to remember is N2N Nail to Nail.

When rolling the fingers, the finger should be rolled completely from one side to the other.

Fundamentals of Fingerprinting

Knowledge of proper techniques. Awareness of good quality

fingerprints, which include clarity and pattern recognition.

Practice.

Recording Rolled Impressions

After the finger has been rolled, the operator should be able to recognize the fingerprint pattern.

LAWLoops Arches Whorls

Awareness Square Edges

Rock And Roll, T.I.F.O., N2N

Awareness Finger Placement

Rock & Roll, T.I.F.O., N2N

Awareness Niblet

Rock & Roll, T.I.F.O., N2N

Awareness Slippage

Rock & Roll, T.I.F.O., N2N

Awareness Dalmation Effect

Rock & Roll, T.I.F.O., N2N

Fundamentals of Fingerprinting

Knowledge of proper techniques. Awareness of good quality

fingerprints, which include clarity and pattern recognition.

Practice.

Thank You!Thank You!