Podcast
Questions and Answers
What type of physical evidence can be associated only with a group and not a single source?
What type of physical evidence can be associated only with a group and not a single source?
Why is hair considered class evidence?
Why is hair considered class evidence?
Which category of evidence refers to anything that contains nuclear DNA?
Which category of evidence refers to anything that contains nuclear DNA?
Study Notes
Physical Evidence and Group Association
- Physical evidence that can be linked only to a group includes fibers, paint chips, and glass fragments.
- These types of evidence do not possess unique characteristics that can pinpoint a specific source.
Hair as Class Evidence
- Hair is classified as class evidence because it lacks nuclear DNA in its standard form, making it impossible to trace back to a single individual.
- When examined, hair can indicate characteristics such as color, length, and racial origin, which are common to a group.
Category of Evidence with Nuclear DNA
- Biological evidence refers to anything that contains nuclear DNA.
- This category includes items like blood, saliva, and tissue samples, which can provide definitive identification of an individual.
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Description
Learn about the two main categories of evidence in forensic science: direct (testimonial) evidence and circumstantial (physical) evidence. Understand the characteristics and examples of each type of evidence and their importance in criminal investigations.
