Fingerprinting Flashcards
MLI of fingerprinting
- Identification of living/dead
- Civil cases - pension, insurance, inheritance, marriage, disputed sex, employment, voting, missing person
- Criminal cases - absconding soldier/criminal, suspect of rape/murder, theft
What is corpus delicti?
Body of offense (concrete evidence to prove crime)
Define dactylography
Process of taking impression of pulp of fingers and thumbs on an unglazed white paper & examining them with magnifying lens
- fingers covered with characteristics ridges which are permanent & unique
What is the locard’s principle of exchange?
When 2 object come in contact with each other, there will be alway a mutual transference of material from each other
What are the 4 basic fingerprint pattern?
- Loop (65%) - radial/ulnar, depending on side of hand the tail points towards
- Whorl (25%) - plain whorl, double loop whorl & central pocket loop whorl
- Arch (7%) - plain/tented
- Mixed (5%)
What are the points for comparison of fingerprints?
- Presence of center (core) & triangle (delta)
- Presence of pores (poroscopy)
- Minutae of ridges - ridge ending, bifurcation, spur formation, dots, lakes, broken/short ridges
- 16-20 points = proof of identity
How to record plain impression?
Gentle pressing inked surface of finger on paper
How to record rolled impression?
Rolling inked finger/thumb side to side
How to record for criminal cases?
Impression taken & preserved for future uses
How to record from dead?
Dried fingertip in soaked alkaline solution
If peeled off (harden by formalin)
What is latent print?
Any chance/accidental impression on surface regardless of whether it is visible/invisible at time of deposition
What is plastic print?
Finger/palm impression deposited in material that retains shape of ridge details (e.g wax, soap, clay)
Poroscopy
Study of pores of sweat glands in papillary ridges of epidermis
Footprints
Stature = max foot length/0.15
