PPT-Development of fingerprints

Latent Prints Latent Fingerprints detection by physical and chemical techniques Prepared By Ms Shruti Rajwar Asst Professor SoFS CUTM Latent Prints Latent means hidden Caused when friction ridges of the skin is pressed against another surface due to the presence of sweat. Fingerprints. 2013-14. Structure of Skin. Skin consists of: . Inner layer—dermis . Outer layer—epidermis. Basal layer or papillary dermis in between. New cells generate here. Basal layer contains DERMAL PAPILLAE that push up on dermis to create ridges with intricate shapes (fingerprints). September . 9. , . 2014. What are Fingerprints?. Does . everyone. have a unique fingerprint? . . How, why, and when do fingerprints develop?. Watch this!. What are Fingerprints?. Does . everyone. have a unique fingerprint? . WHORL PATTERN. FINGERPRINT. FINGERPRINT patterns. GALTON DETAILS. Galton Characteristics. . SHORT RIDGE/. ISLAND . DOT . FORK/. BIFURCATION ENDING RIDGE. s and . the State. HI269. Week . 4. But first…. A few reminders:. Your first media journal/ . SecondLife. journal/ . SecondLife. . blog. entries are due . by Tuesday Week 5. . Note that my first . . . Three fundamental principals of Fingerprints. Individual characteristic. Will remain unchanged during the individual’s lifetime. Have general characteristic ridge patterns that permit systematic classification. FINGERPRINTS. To prove that everybody has different fingerprint. Aim. Materials. Lead pencils. Small pieces of white paper. Sellotape. Magnifying glass. Method. Using a pencil Scribble quite quickly on white paper. “Fingerprints can not lie, . but liars can make fingerprints.”. —. Unknown. RECORDING PRINTS. rolling . inked prints. primary identification number. LIFTING PRINTS. Black. , white and fluorescent powder. Can any two people have the same fingerprint?. Basic Principles. According to criminal investigators, fingerprints follow 3 fundamental principles:. A fingerprint is an . individual. characteristic; no two people have been found with the . day 1. Indentifying Individual Prints. Fingerprints. Fingerprint Principles. According to criminal investigators, fingerprints follow 3 fundamental principles:. A fingerprint is an . individual. characteristic; no two people have been found with the . What you Need to Know . (but may already know). History. Sir Edward Henry (of London Metropolitan Police) developed modern system of identifying criminals by their fingerprints in . 1900 . The Henry system (as it is sometimes known) was so useful in criminal investigations that it was adopted around the world. History of Fingerprints. 1788 - Johann Mayer . noted that the arrangement of skin ridges is never duplicated in two persons. He was probably the first scientist to recognize this fact. . 1880 – Henry Fauld. a. Identify and utilize appropriate techniques used to lift and evaluate readable, latent, plastic and visible fingerprints. . SFS2. Students will use various scientific techniques to analyze physical and trace evidence. . 2 Types of Crime-Scene Prints. 1. Visible Print- A fingerprint made when the finger deposits a visible material such as ink, dirt, or blood onto a surface.. 2. Plastic Print- A fingerprint impression in a soft surface.. Quick Quiz. Can you tell if they match?. www.newscientist.com/gallery/mg20527522600-guess-the-fingerprints. Fingerprints (and also toe prints) can be used to identify a single individual because they are unique to each person and they do not change over time. .