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Pointing Out Perpetrators

Pointing Out Perpetrators. By: Johnathan Crayton & Starkeda Stowes. Let’s Review!. Professor Juan walked in the classroom to an overwhelming surprise of a birthday cake made by his fellow students. When asked whom made the cake, surprisingly, there was no answer.

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Pointing Out Perpetrators

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  1. Pointing Out Perpetrators By: Johnathan Crayton & Starkeda Stowes

  2. Let’s Review! • Professor Juan walked in the classroom to an overwhelming surprise of a birthday cake made by his fellow students. • When asked whom made the cake, surprisingly, there was no answer. • Shocked by his students reply, he decided to turn this mystery into a “crime scene” and carry out an investigation. • Professor Juan plans to take the fingerprints of each student and match them with those left at the crime scene on some glass slides.

  3. Let’s Investigate! • First, we must collect all the evidence we can! • We do this by finding anything left on the crime scene such as: • Hair • Fingerprints • Shoeprints • Body Fluids • Markings • Etc.

  4. Fingerprints • Human Fingerprint patterns fall into three main groups: whorls, loops, and arches. Loops are the most common type, accounting for about 65 percent of all fingerprints. Whorls account for 30 percent of finger fingerprints, and arches for 5 percent. Despite these broad patterns, each individual has a unique set of fingerprints, which can be used as a means of personal identification.

  5. Collecting Fingerprints • Dusting for fingerprints. • Dust the slide with powder. Place a strip of tape over the dusted print. • Remove the tape and place it on a fingerprint card so we can refer back to it.

  6. Procedure For Taking Fingerprints • First, we must make a fingerprint identification sheet of everyone in the class. • Make 2 heavy fingerprints on the opposite ends of a glass slide. • Dust the slide with black powder to make the invisible print visible. • Now, gently put a strip of tape on the slide. Remove the tape and place it on the fingerprint identification sheet and on the back of your fingerprint card.

  7. Matching Prints • Take out the glass slide that have the perpetrator’s fingerprints. • Compare the prints on the slide to the set of prints that was taken earlier from the class.

  8. Who is the Perpetrator??

  9. Ashley Clampitt!

  10. Worksheet • Describe on the worksheet if the conspirator has a loop, whorl, or arch fingerprint. • Also, examine your classmates and classify them as loops, whorls, or arches. • Complete and turn in worksheet at the end of class to be graded!.. No gimmies!

  11. Thanks To Johnathan Crayton & Starkeda Stowes

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