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Objective: SWBAT compare and match lip prints and knife edge prints

Objective: SWBAT compare and match lip prints and knife edge prints. Fingerprint sponge 4 (complete in your composition notebook and record the entry in your table of contents): Write the daily objective Describe the difference between a latent print, a plastic print, and a patent print.

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Objective: SWBAT compare and match lip prints and knife edge prints

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  1. Objective: SWBAT compare and match lip prints and knife edge prints Fingerprint sponge 4 (complete in your composition notebook and record the entry in your table of contents): • Write the daily objective • Describe the difference between a latent print, a plastic print, and a patent print

  2. Table of Contents 10/16 Fingerprint Sponge 1 35ish Fingerprint notes part 1 35ish Fingerprint exit ticket 1 37ish 10/18 Fingerprint Sponge 2 38ish Fingerprint notes part 2 38ish 10/24 Fingerprint Sponge 3 40ish Fingerprint notes part 3 40ish 11/1 Fingerprint Sponge 4 42ish Other prints notes 42ish

  3. Homework • Chapter 6 Review Questions on Quia were due Sunday 10/28 by 11:59 pm • Oct. 31 or Nov. 1 Science Fair Research papers are due TODAY!!!! • Quiz Monday 11/5 on Fingerprints (major patterns, minutiae, lifting prints)

  4. FORENSIC SCIENCEPrints

  5. PrintsDactyloscopy: the study of fingerprints • Other Types of Prints • Palm, lip, teeth, eye, ear, voice, shoe and feet prints

  6. What is a Fingerprint? • Skin has an outer layer (epidermis) which has ridges projecting inward, and an inner layer (dermis) which has projections pressing into the spaces between ridges • A fingerprint is a pattern made by the friction ridges, which is left behind due to sweat and oil that sticks to them. • Fingerprints form during the fetal stage of development (10 wks)

  7. Fundamental Principlesof Fingerprints • A fingerprint is an individual characteristic. • A fingerprint will remain unchanged during an individual’s lifetime. • Fingerprints have general characteristics ridge patterns that permit them to be systematically classified.

  8. Ridge Characteristics Minutia--lines of the fingerprint • ridge ending • bifurcation • short ridge • dot or island • enclosure

  9. MINUTIA RIDGE ENDING BIFURCATION

  10. MINUTIA SHORT RIDGE DOT or ISLAND ENCLOSURE

  11. Arch Types • Plain- the arch is mild • Tented- the arch is spiked upward

  12. Plain arch

  13. Tented arch

  14. Loop Loops must have one delta (a triangle pattern) Types • Radial--opens toward the thumb • Ulnar--opens toward the “pinky” (little finger) Which type of loop is this, if on the right hand? Left hand?

  15. Whorl A Whorl has a minimum of 2 deltas. Types • Plain- 2 symmetric deltas and a complete ridge circuit (circular in pattern) • Central Pocket- 2 asymmetric deltas, one side appears to be stretched • Double Loop- 2 loops and 2 deltas • Accidental- a whorl that does not fit the 3 above pattern types Plain whorl

  16. Central Pocket Whorl

  17. Double Loop (whorl)

  18. Accidental whorl

  19. Human population fingerprint distribution • Loops: 65% • Whorls: 30% • Arches: 5%

  20. Latent Prints Latent fingerprints are those that are “hidden” and are not visible to the naked eye. These prints consist only of the natural secretions of human skin and require treatment to cause them to become visible.

  21. Lifting Latent Prints • Powders--adhere to both water and fatty deposits. Choose a color to contrast the background. • Iodine--fumes react with oils and fats to produce a temporary yellow brown reaction.

  22. Lifting Latent Prints (cont) • Ninhydrin--reacts with amino acids to produce a purple reaction. • Cyanoacrylate--”super glue” fumes react with water and other fingerprint constituents to form a hard, whitish deposit. • Magnetic powders for shiny surfaces .

  23. Cyanoacrylate Fingerprints

  24. Other Prints • Ears--shape, length and width • Face--pictures being used in Florida to find criminals • Voice--electronic pulses measured on a spectrograph • Feet--size of foot and toes; lines of the feet • Shoes--can be compared and identified by type of shoe, brand, size and year of purchase

  25. Other Prints Palm--lines can be identified and may be used against suspects.

  26. Other Prints Foot Prints are taken at birth as a means of identification for infants.

  27. Other Prints The study of lip-prints is called cheiloscopy Lips--display one of five common patterns • Short vertical lines • Long vertical lines • Rectangular lines that may crisscross • Diamond • Branching

  28. Other Prints • The use of lip prints is not yet firmly established in our courts. • Two ways to potentially use lip prints: • 1- print patterns for identification • 2- chromatography to match lipstick marks

  29. Other Prints Teeth--bite marks are unique and can be used to identify suspects. These imprints were placed in gum and could be matched to crime scene evidence.

  30. Other Prints The blood vessel patterns may be unique to individuals. They are used for today various security purposes.

  31. Text-Dependent Questioning Pre-reading questions • Define labial mucosa • Define sulci-labiorum • Define abscond Post-reading questions • According to the state of Illinois, are lip prints class or individual evidence? • Reread the aim of the study. Why are the results of this study important for how evidence is used in a court of law?

  32. Objective: SWBAT complete the fingerprints quiz with 80% accuracy Fingerprint sponge 5 (complete in your composition notebook and record the entry in your table of contents): • Write the daily objective • Identify the types of fingerprints below:

  33. Table of Contents 10/16 Fingerprint Sponge 1 35ish Fingerprint notes part 1 35ish Fingerprint exit ticket 1 37ish 10/18 Fingerprint Sponge 2 38ish Fingerprint notes part 2 38ish 10/24 Fingerprint Sponge 3 40ish Fingerprint notes part 3 40ish 11/1 Fingerprint Sponge 4 42ish Other prints notes 42ish 11/4 Fingerprint Sponge 5 44ish Text-dependent questions 44ish

  34. Homework • Quiz Today 11/5 on Fingerprints (major patterns, minutiae, lifting prints)!!!! • NEXT WEEK: 15 week exams, Science Fair powerpoint presentations

  35. For clarity and saving Ms. Maness’ voice • Clap/stomp for class’ attention • Rules for reading activities • Everyone has the right to an attentive audience • Everyone has the obligation to read along • Everyone has the right to receive props (from everyone), when props are due

  36. Text-dependent Questions Pre-reading questions Post-reading questions • Define reticular • Define indispensable • What does the sample group in the study suggest about what the study is trying to find out? • What did the results of the study tell us about the relationship between gender and lip-print? • Why would the results of the Vahanwalaparekh study affect how forensic investigators use lip-prints as evidence? • How are the classifications of lip-prints left on a surface similar to the classifications of fingerprints?

  37. Notebook collection!!!

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