What type of substances may be included in a suspect's crime lab report?

The inclusion of illegal drugs used by the suspect in a crime lab report is appropriate because the primary focus of a crime lab investigation is to analyze substances that are potentially linked to criminal activity. When a suspect is involved in a crime that relates to drug offenses, any illegal drugs found in their possession or at the scene would be essential evidence. The crime lab performs tests to identify and quantify these substances, which can bolster the prosecution's case against the suspect.

Additionally, analyzing these drugs helps establish patterns of behavior and can yield information about distribution networks or usage habits relevant to the case. The results can also influence the judicial proceedings, such as determining charges or sentencing outcomes.

Other types of substances, such as those purchased legally in stores or common household items, may not directly relate to the suspected criminal activity or provide the crucial evidence needed for the investigation and legal processes. While they may have some relevance, they do not hold the same weight as illegal drugs in a context focused on criminal prosecution.