The image shown is of a Fingerprint.
In the Henry Classification System, there are three basic fingerprint patterns: loop, whorl, and arch, which constitute 60–65 percent, 30–35 percent, and 5 percent of all fingerprints respectively
Identification of an Individual in Forensic Science
- It is the study of epidermal ridges and their configurations.
- Fingerprints are present from birth both on epidermis and dermis, remain constant throughout life and can’t be altered without destroying true skin.
- The Ridge pattern of fingerprints appears as early as 12 weeks of IUL and is completed by 24 weeks.
- Locard’s principle of exchange
- When 2 objects come in contact with each other, there will be always a mutual transference of material from each other.
- Fingerprint / Dactylography / Dermatoglyphics :
- Dactylography is the process of taking impressions of the pulp of fingers and thumbs on an unglazed white paper and examining them with a magnifying lens.
- Loops (67% most common) > whorls (25%) > arches (7%) > composite (2% least common) are four main types of pattern.
- Exemplar prints:
- Fingerprints deliberately collected from a subject, whether for purposes of enrollment in a system or when under arrest for a suspected criminal offense.
- Latent print:
- It means any chance or accidental impression on a surface, regardless of whether it is visible or invisible at the time of deposition.
- Latent Prints are Detected by Radioactive sulfur dioxide, Sudan black. Osmium tetraoxide, Electromyography.
- Plastic print:
- A finger or palm impression deposited in a material that retains the shape of the ridge detail.
- Example: Soft materials like wax, soap, clay, etc.
- Visible print :
- impression on blood, paint, dust, dye which can be recorded by photography.