Forensic Science Concepts and Principles

The video tutorial introduces forensic science, focusing on the role and types of physical evidence in crime scene investigations. It explains Locard's principle of exchange, which states that every contact leaves a trace, and discusses various types of physical evidence, including biological fluids, impression evidence, and trace evidence. The tutorial also covers the sources of physical evidence, such as the crime scene, victim, and suspect, and highlights the significance of physical evidence in establishing links between crime scenes and suspects, proving or disproving testimonies, and identifying individuals involved in crimes.

What are the three states of matter in which physical evidence can be found?

• Solid, Gas, Plasma

• Solid, Liquid, Plasma

• Solid, Liquid, Gas

• Liquid, Gas, Plasma

Which principle states that every contact leaves a trace?

• The Law of Conservation of Mass

• Murphy's Law

• Newton's Third Law

• Locard's Principle of Exchange

Which type of evidence includes fingerprints and footprints?

• Trace Evidence

• Impression Evidence

• Biological Evidence

• Chemical Evidence

What type of document can be considered a questioned document?

• A newspaper article

• A printed book

• A handwritten note

• A legal contract

Which of the following is NOT a source of physical evidence?

• Weather Conditions

• Suspect's Environment

• Victim

• Crime Scene

What is the primary purpose of establishing corpus delicti?

• To prove a crime has occurred

• To determine the cause of death

• To identify the suspect

• To find the motive of the crime

How can physical evidence help in proving or disproving testimonies?

• By providing an alibi

• By determining the time of the crime

• By identifying the motive

• By linking or not linking a person to the crime scene

What does the term 'modus operandi' refer to?

• The motive behind a crime

• The method of operation used in a crime

• The time a crime was committed

• The location of a crime

How can the number of people involved in a crime be determined?

• By interviewing witnesses

• By examining the number of glasses found

• By counting the number of fingerprints

• By analyzing the crime scene layout

What is the role of forensic science in relation to innocent individuals?

• To ignore their involvement

• To implicate them in the crime

• To eliminate them from suspicion

• To punish them