Fingerprint Content Flashcards
made by fingers touching a surface after the ridges have been in contact with a colored material (ex: blood, paint, dirt, ink)
visible prints
ridge impressions left on a soft material (ex: putty, wax, soap, dust)
Plastic Prints/ Impressions
invisible prints left behind by clear oils on the fingertips
latent prints
can locate prints on most non-absorbent surfaces without the aid of a chemical or powders
RUVIS (reflected ultraviolet imaging systems)
can be used to make latent prints visible
fingerprint powders
… and … powders are adequate for most latent print work
black and gray
3 methods for collecting fingerprints
- Iodine Fuming
- Ninhydrin Chemical Reaction
- Super glue Fuming
prints remain … during an individuals lifetime with the exception of …
unchanged; injuries
careful study of ridge characteristics
minutiae
T/F: no two people have the same fingerprint
True
the center of a loop or whorl
core
a triangular region near a loop
delta
- counting from the core to the edge of the delta
- distinguishes one fingerprint from another
ridge count
3 types of whorls
- central pocket loop whorl
- double loop whorl
- accidental whorl
2 types of arches
- plain arch
- tented arch
What are fingerprints a result of?
oil and secration
Where are the soils and secration that are transferred to a surface by the what of ones finger?
ridges
fingerprints are considered to be a form of … evidence
class
You need at least a … from a crime scene in order for it to be used as evidence
partial print
… dusted in order to identify ridge patterns
Plastic/Impression
most common form of fingerprints?
loops
Program used to house fingerprints and make it possible to obtain a match of a fingerprint
AFIS (automated fingerprint identification system)
What does a fingerprint examiner look for between a suspect print and a crime scene print?
similar minute patterns
fingerprint extracting method that uses chemical reactions to make prints visible
superglue Fuming
