HONOURABLE MENTION

How can forensic scientists use and trace evidence to explain what happened at a crime scene?

Footprints, fingerprints, DNA samples, and bias all contribute to help forensic scientists figure out what happened at a crime scene, as well as figure out who was involved..
Elissa Taha
Grade 8

Presentation

No video provided

Problem

How can forensic scientists use and trace evidence to explain what happened at a crime scene? 

What are the different types of fingerprints? How are they used to identify a criminal?

- How do scientists use DNA to track a criminal?

- How are footprints helpful to forensic scientists?

- What is bias? How can it affect the ideas people have about a criminal?

- How do all these factors explain what happened at the scene of the crime?

 

 

 

 

 

Method

No method due to this being a research project.

Research

Fingerprints

  • Three different types
  • Loop, arch, and whorl

How are fingerprints used to identify a criminal? 

Analysis

  • Is the fingerprint usable for comparison?

Comparisons

  • Compare fingerprints to see if they match

Evaluation

  • Do the prints have enough features to be the same

Verification

  • Conclusion

DNA samples

How do scientists use DNA to track a criminal?

Sources of DNA

  • Saliva, blood, hair, cells, and urine

Samples that could contain DNA

  • Hairbrushes, toothbrushes, cups clothing, hats, tools, nail clippings

Scientists use these sources and samples to connect to the DNA at a crime scene to the suspect.

Footprints

How are footprints helpful to forensic scientists?

There are three different types/categories for footprints:

Visible

  • Can be seen easily with no tools, just your eye                                

Plastic

  • A 3D print in a substance

Latent

  • Not visible without tools
  • Created due to static charges

Bias

What is bias? How can it affect the ideas people have about a criminal?

What is Bias?

  • To assume or lean in a certain direction.

What Are Some Types of Bias?

  • Gender bias
  • Race bias

How does it affect an investigation?

  • People can assume that one person committed a crime because of looks, age, gender, race or behaviour

 

 

 



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Data

No data due to this being a research project.

Conclusion

CONCLUSIONS

How do all these factors explain what happened at the scene of the crime? Well, Footprints, fingerprints, and DNA samples can lead you to a suspect, witness or victim. This can help lead to conclusions in an investigation. Bias can sometimes negatively affect an investigation because it can lead to assumptions about who committed the crime, as well as where, when, why, and how it took place. 

 

Citations

Acknowledgement

I would like to acknoledge my parents and teachers, for helping me and supporting me during this project.