After completing this module, you will be able to:
Learn about the different types of evidence.
Examine the difference between individual and class characteristics and what they mean
for crime investigations.
Discuss how physical and chemical properties help forensic scientists compare samples.
Investigate glass fragments and soil as physical evidence and what they can tell forensic
scientists about a crime.
Discuss how impressions, like footprints and tire tracks, are collected and analyzed.
General Key Terms
Ridge characteristics or minutiae
3.02 Types of Evidence
What are the four types of evidence
in a criminal investigation?
Briefly explain each type
Physical evidence includes tangible
objects such as weapons, trace
evidence like hair, blood, or fibers, as
well as fingerprints. These items are
real, direct evidence of the crime and
the individuals involved.
Documentary evidence is any type of
written or recorded evidence, such as
a recording of a telephone
conversation or a video recording of a
crime. The recording is typically
authenticated by an expert to show