Forensic Investigation
A print left on an object: fingerprint. Fingerprints are left
on everything you touch; your skin leaves a layer of skin
fat on the object. A kind of stamp is created. Fingerprints
are only left at a crime scene; later, a complete print is
made of their fingerprint to be able to identify them. a
crime scene, you can never find a fingerstamp only
fingerprints because it is a trace of the perpetrator or
other people who were at a crime scene.
Papillary lines: these are linear elevations in your skin that
ensure you leave a print. These papillary lines contain
many pores (small openings) From which transparent fluid
(sweat) continuously comes out; this is the layer of fat you
leave behind. The sweat spreads over the papillary lines;
the sweat consists of various substances: fats, water,
salts. Water evaporates, but the salt and fat and other
substances remain on and between the papillary lines. If
you now pick up an object, the transparent fluid with salts
and fats and non-evaporating substances is left on the
object, creating a greasy print that you cannot see very
well but can make visible with various powders. Each
person has their own unique fingerprint, even twins. This
is one of the best characteristics for identifying people
because they are so unique, compared to characteristics
such as blood and blood types that are not so unique.
Typica = unique small characteristics in a fingerprint
(such as the endpoint or split of a line), used to recognize
people.
, Explanation videos:
https://www.youtube.com/watch?v=wNOGeVjbUxo
https://www.youtube.com/watch?v=iCRy8voU5dE
Classification of fingerprints
Dactyloscopic points: corresponding. typica and their
corresponding location are examined here. This is also
called a classification code.Other reasons why this is good
for identification: according to Galton:
The line pattern remains the same throughout life
Variation in the number of different patterns is large
Fingerprints can be classified
A fingerprint consists of a delta and a core. The core is the
center point, and the delta is a triangle that is often next
to the core. The differences in the location of the core and
delta are used to classify fingerprints into a main pattern.
A print left on an object: fingerprint. Fingerprints are left
on everything you touch; your skin leaves a layer of skin
fat on the object. A kind of stamp is created. Fingerprints
are only left at a crime scene; later, a complete print is
made of their fingerprint to be able to identify them. a
crime scene, you can never find a fingerstamp only
fingerprints because it is a trace of the perpetrator or
other people who were at a crime scene.
Papillary lines: these are linear elevations in your skin that
ensure you leave a print. These papillary lines contain
many pores (small openings) From which transparent fluid
(sweat) continuously comes out; this is the layer of fat you
leave behind. The sweat spreads over the papillary lines;
the sweat consists of various substances: fats, water,
salts. Water evaporates, but the salt and fat and other
substances remain on and between the papillary lines. If
you now pick up an object, the transparent fluid with salts
and fats and non-evaporating substances is left on the
object, creating a greasy print that you cannot see very
well but can make visible with various powders. Each
person has their own unique fingerprint, even twins. This
is one of the best characteristics for identifying people
because they are so unique, compared to characteristics
such as blood and blood types that are not so unique.
Typica = unique small characteristics in a fingerprint
(such as the endpoint or split of a line), used to recognize
people.
, Explanation videos:
https://www.youtube.com/watch?v=wNOGeVjbUxo
https://www.youtube.com/watch?v=iCRy8voU5dE
Classification of fingerprints
Dactyloscopic points: corresponding. typica and their
corresponding location are examined here. This is also
called a classification code.Other reasons why this is good
for identification: according to Galton:
The line pattern remains the same throughout life
Variation in the number of different patterns is large
Fingerprints can be classified
A fingerprint consists of a delta and a core. The core is the
center point, and the delta is a triangle that is often next
to the core. The differences in the location of the core and
delta are used to classify fingerprints into a main pattern.
