Ch. 5 Notes - Fingerprints (Pg. 2-3)

Types of Arches

Plain and Tented - Has a spike in the center

Types of Loops

Radial and Ulnar

Types of Whorls

Plain, Double, Accidental, Central pocket

Minutiae

Details in fingerprints where ridge patterns come together or end, considered unique to individuals

Ridge Count

Counting intersecting ridges from the core to the delta to distinguish fingerprints

Patent fingerprints

Visible prints left on smooth surfaces by substances like blood, ink, or grease

Plastic fingerprints

Indentations in soft materials like clay, putty, or wax

Latent fingerprints

Invisible prints caused by body secretions, made visible using chemicals

Dusting for fingerprints

Using carbon powder to make fingerprints visible and tape to lift them

Metal or magnetic powders

Used to lift latent fingerprints for analysis.