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Crime Scene and DNA Basics for Forensic Analysts


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National Institute of Justice (NIJ) (see reuse policy).

Welcome to the Crime Scene and DNA Basics for Forensic Analysts course

This course provides information in the two lessons Evidence at the Crime Scene and History and Types of Forensic DNA Testing.

The first lesson addresses the importance of documenting, protecting, and preserving the scene and what types of evidence can be found there and methods used for its collection and preservation.

The second lesson addresses the historical use and disadvantages of restriction fragment length polymorphisms (RFLP), the method and sequence of steps in which DNA profiles are developed, and the concept of short tandem repeats (STR) testing and its advantages over earlier methods.

Taking the Course

Starting the course. Select the top link in the navigation on the right.

Navigating the course. We recommend you go through the course page-by-page using the Forward and Back buttons at the bottom of the page. You may skip around and select lessons using the navigation on the right.


Information addressed in this interactive training program is delivered in two modules. Select a module below to begin.

Evidence at the Crime Scene
History and Types of Forensic DNA Testing