Forensic Science - Unit 2 - Crime Scene Investigation(All
correctly answered)
Know and understand Locard's Principle correct answers The perpetrator of a crime will bring
something into the crime scene and leave with something from it, and that both can be used as
forensic evidence
What is evidence? correct answers Something that tends to establish or disprove a fact. Includes
documents, testimony and other objects.
Explain class evidence. correct answers Things that can be traced back to many people such as a
tire tread or foot print.
Explain individual evidence. correct answers Things that can be traced back to an individual
person such as a finger print, blood samples, DNA.
What is direct evidence? correct answers Statements of an eye witness in court
Give two examples of indirect evidence. correct answers Circumstantial evidence that implies
something such as fingerprints, blood, hair
Why is chain of custody important? correct answers Documentation of who controls the
evidence from when an item becomes evidence. Helps to show that the evidence being offered
has not been tampered with and is authentic.
Who responds to a crime scene? correct answers Police, crime scene investigators, medical
examiners, detectives, specialists, possibly district attorney
Explain steps in chain of custody. correct answers 1) Bags evidence, marks it for identification,
seals it and signs it across the sealed edge.
2) Signed over to a lab tech for analysis who opens it, but not the sealed edge.
3) After analysis, the lab tech puts the evidence back in the evidence bag, seals it in another bag
and signs the evidence log.
Define trace evidence. correct answers small but measurable amounts of physical or biological
material found at a crime scene
Seven S's of crime scene investigation correct answers - Secure scene
- Separate witnesses
- Scan scene
- See that crime scene examiners receive overall and close up photos
- Sketch scene
- Search for evidence
- Secure collected evidence
correctly answered)
Know and understand Locard's Principle correct answers The perpetrator of a crime will bring
something into the crime scene and leave with something from it, and that both can be used as
forensic evidence
What is evidence? correct answers Something that tends to establish or disprove a fact. Includes
documents, testimony and other objects.
Explain class evidence. correct answers Things that can be traced back to many people such as a
tire tread or foot print.
Explain individual evidence. correct answers Things that can be traced back to an individual
person such as a finger print, blood samples, DNA.
What is direct evidence? correct answers Statements of an eye witness in court
Give two examples of indirect evidence. correct answers Circumstantial evidence that implies
something such as fingerprints, blood, hair
Why is chain of custody important? correct answers Documentation of who controls the
evidence from when an item becomes evidence. Helps to show that the evidence being offered
has not been tampered with and is authentic.
Who responds to a crime scene? correct answers Police, crime scene investigators, medical
examiners, detectives, specialists, possibly district attorney
Explain steps in chain of custody. correct answers 1) Bags evidence, marks it for identification,
seals it and signs it across the sealed edge.
2) Signed over to a lab tech for analysis who opens it, but not the sealed edge.
3) After analysis, the lab tech puts the evidence back in the evidence bag, seals it in another bag
and signs the evidence log.
Define trace evidence. correct answers small but measurable amounts of physical or biological
material found at a crime scene
Seven S's of crime scene investigation correct answers - Secure scene
- Separate witnesses
- Scan scene
- See that crime scene examiners receive overall and close up photos
- Sketch scene
- Search for evidence
- Secure collected evidence
