Describe/define that topic for the reader and include citation/source information
explain the importance of your topic in the overall investigation process
identify the impacts if an investigator does not ‘get it right’
For example, in discussing contamination of evidence, you need to define what that means, how it occurs, what challenges there are to minimizing it, and what outcomes can occur if it isn’t done right. Is it loss of evidence? Potential identification of the wrong suspect?, etc.