Casting Fingerfprints

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A senior investigator has instructed one of the new recruits to lift possible fingerprints from various spots within the crime scene and to collect and preserve footwear and tiretrack impressions that have been located outside of the abandoned warehouse. This is the first time that the investigator will be performing these duties in an actual crime scene, and he has asked you to help him through the process to ensure that he produces the best evidence. In this assignment, you will provide a walk-through for the new investigator on the fingerprinting and casting processes.

What is the casting process used for the footwear and tiretread impressions outside of the warehouse? Explain in detail.

• What materials will you use to lift these molds from the ground? Explain.
• What is the process for casting these impressions and creating molds? Describe and explain in detail using a step-by-step process.
  • Briefly explain the purpose of each step.