CCJS 320: Introduction to Criminalistics

CCJS 320 at the University of Maryland Global Campus explains how physical evidence moves from a scene into a forensic laboratory, and what happens to it there.

UMGC's catalog describes an overview of the proper methods for collecting, packaging, preserving and analyzing physical evidence. Topics include how a forensic laboratory is organized, the disciplines within it, the tests it conducts and the role of the forensic scientist. The prerequisite is CCJS 101.

It is one of six required courses in UMGC's undergraduate certificate in Crime Scene Investigation, and it can serve as the prerequisite for CCJS 440 Fingerprint Analysis. Students find it demanding because it mixes science vocabulary with strict procedure.

What CCJS 320 Covers

Key Concepts Explained

Packaging That Protects the Evidence

Packaging depends on the item. Damp biological material is usually air-dried and placed in paper, because sealed plastic traps moisture and encourages decay. Each package is sealed, labeled and signed.

Chain of Custody

A written record of everyone who handled an item, when and why. Gaps can make evidence vulnerable to challenge in court.

Locard's Exchange Principle

The idea that contact between two things leaves traces on both. It explains why trace evidence is searched for at all.

Typical Assignments and How to Approach Them

Inside the Forensic Laboratory

A large part of CCJS 320 is learning how a crime laboratory is organized and what each section can realistically tell investigators. Laboratories differ in size, but most group work along these lines:

In written answers, explain how evidence is routed: a single item, such as a handgun, may visit several sections in a set order so that one examination does not destroy evidence another section needs. Showing you understand that sequence is a sign you have grasped the course.

Where CCJS 320 Fits

CCJS 320 sits between the introductory forensics course, CCJS 101, and the specialized courses that follow. In UMGC's Crime Scene Investigation certificate it is taken alongside CCJS 342 Crime Scene Investigation and CCJS 420 Medical and Legal Investigations of Death, and it opens the way to CCJS 440 Fingerprint Analysis.

That position shapes what markers look for. They expect accurate terminology and correct procedure rather than deep laboratory technique, and they reward answers that connect the scene to the laboratory: how a collection decision made on site affects what the lab can do later.

Where Students Get Stuck

• One packaging rule for everything. Wet, dry, trace and digital items each need different handling.
• Thin documentation. Notes, photos and custody forms deserve as much attention as the collection itself.
• Confusing lab sections. Keep a chart of which section handles which evidence type.
• Television expectations. Real lab work takes time and has limits; say so where relevant.

Study Tips for CCJS 320

• Make a table of evidence types with collection, packaging and preservation methods.
• Practice writing labels and custody entries for imaginary items.
• Learn the basic tests for each lab section in one sentence each.
• Keep this course's notes for CCJS 342 and CCJS 440, which build on them.

How We Help with CCJS 320

Send the assignment prompt, readings, rubric and any feedback. A tutor with a forensic science background explains procedures, reviews your draft for accuracy or prepares a custom answer to study. Our criminal justice assignment help guide describes broader support.

GradeEssays is independent of the University of Maryland Global Campus. Our work is a study aid: use it to understand the material, then write and submit your own answers under UMGC's academic integrity policy.