Simple but powerful one-page report

Once the forensic analysis is complete, the MSHP Crime Laboratory issues a Certified Report. This one-page summary is the primary document used by prosecutors to support drug charges. For defendants and legal counsel, understanding the specific language in this report is essential for verifying the evidence against them.

Key Components of the Certified Report

Using the redacted report located here, as a template, here is what to look for:

• The Analysis Result: This section identifies the controlled substance found. In this case, the lab confirmed the presence of methamphetamine, a Schedule II substance.
• Measurement of Weight: The substance is reported with a specific weight and a “margin of error” +/-
• Coverage Probability: The report states that the “coverage probability for reported weights is approximately 95%“. This is a statistical measure of the lab’s confidence in that weight measurement.
• Methods of Analysis: The report lists the specific scientific tests used to reach the conclusion. Common methods include gas chromatography/mass spectrometry (GC/MS) which is the gold standard vs. the field testing and even laser testing discussed here and here.

Why the Small Details Matter

The information on this single page can have a significant impact on a legal case:

1. Charge Levels: In Missouri, drug charges are often based on the weight of the substance. A measurement that is close to a statutory threshold (e.g., just over 2 grams or 10 grams) should be closely scrutinized alongside the +/- margin of error.
2. Certification and Review: Every report is signed by a Forensic Scientist (the analyst) and a Reviewer to ensure quality control.
3. Chain of Custody: The report references a specific Lab Number and Agency Case Number, which allows the defense to trace the evidence from the moment of seizure to the moment of testing.

While the summary page provides the “bottom line,” the full story of the testing process is often hidden in the Lab Bench Notes, which will be covered in the next post.