DNA – A powerful tool of Forensic Science for solving Criminal Cases


Hello Dear Readers

We all know that any living organisms are made up of RNA (Ribonucleic acid ) or DNA (Deoxyribonucleic acid ). 

We Human Beings (Homo Sapiens) are made up of DNA.  

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DNA’s Basic Components includes Nucleotides The four nucleotides that make up DNA are adenine (A), thymine (T), guanine (G), and cytosine (C). Base pairs Nucleotides attach to each other to form base pairs, with A pairing with T (A=T) and G pairing with C (G=C) DNA strands Nucleotides are linked together to form a polynucleotide chain, or DNA strand. Double helix The two DNA strands run in an antiparallel fashion, forming a right-handed double helix. Above are some basic information regarding DNA Saga Today I will discuss a case study where Forensic Experts were able to catch a criminal and was able to resolve an unresolved mystery. Here it is as follows:



Forensic Case Study: Solving a Mystery Through DNA Analysis

Introduction to DNA and Forensics:

DNA, or Deoxyribonucleic Acid, serves as the fundamental building block of genetic identity. Its key components—nucleotides—are made up of four bases:

  • Adenine (A) pairs with Thymine (T)
  • Guanine (G) pairs with Cytosine (C)

These base pairs form a double helix structure, with the strands running antiparallel to each other. This unique configuration makes DNA a powerful tool in forensic science to identify individuals with high accuracy.

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Case Study: The Murder of Dr. Sneha Philip – Solved Through Forensic Evidence

Background:

  • Date of Disappearance: September 10, 2001
  • Location: New York City
  • Age: 35
  • Profession: Doctor

Dr. Sneha Philip disappeared one day before the 9/11 terrorist attacks. Initially, authorities believed she might have perished while aiding victims during the collapse of the World Trade Center. However, inconsistencies in this narrative and findings from her personal life led to further investigation, revealing complexities that pointed toward foul play.

The Investigation Summary

1. Initial Suspicion

  • Dr. Philip's disappearance was initially linked to the events of 9/11.
  • However, inconsistencies and details about her troubled personal life raised suspicions of foul play.

2. Forensic Analysis of Her Apartment

  • Luminol Testing: Revealed hidden blood evidence.
  • DNA Confirmation: The blood was identified as Dr. Philip's, suggesting an altercation or possible murder occurred in her residence.

3. Digital and Trace Evidence

  • Financial Records: Showed purchases of cleaning supplies shortly before she vanished.
  • Surveillance Footage: Captured a figure resembling her entering her apartment but not exiting.
  • Fiber Analysis: Unusual fibers were found on her belongings, consistent with materials used in crime scene cleanup.

4. Breakthrough with Advanced Forensic Techniques

  • Analysis of fingerprints, blood patterns, and fabric threads uncovered discrepancies in witness statements.
  • Evidence indicated she was likely attacked at home and efforts were made to cover up the crime.

Conclusion:

The combination of blood pattern analysis, DNA testing, digital forensics, and trace evidence ultimately disproved the initial 9/11-related disappearance theory. Instead, it pointed towards homicide, though the exact perpetrator remained elusive. The forensic evidence allowed experts to reconstruct events accurately and highlighted how crucial forensic science is in solving complex criminal cases.

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This case showcases the importance of forensic analysis in solving crimes where the narrative initially misleads investigators.

 Reference: Forensic Files  

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