American Board of Medicolegal Death Investigators (ABMDI) Practice Exam

In the process of collecting trace evidence at a scene, which action should an investigator NOT take?

1. identify methods to "lift" or remove necessary evidence

2. take a photograph of the body with evidence location

3. collect hair samples before examination by the medical examiner

4. package or preserve the evidence appropriately

The correct answer is: collect hair samples before examination by the medical examiner

In the process of collecting trace evidence at a scene, it is crucial for an investigator to understand the sequence and appropriateness of actions taken in relation to evidence collection. Collecting hair samples before the examination by the medical examiner is not advisable, as it might compromise the integrity of the evidence and negate the potential for a thorough examination. The medical examiner or forensic expert plays a vital role in ensuring that evidence is collected and handled properly according to established protocols. Evidence should be carefully preserved and documented by those designated to do so, ensuring that all examinations are conducted in a controlled manner. This involves allowing the medical examiner to examine the body first, which helps to maintain the context and relationship of the evidence found at the scene. Once this examination is complete, then the actual collection of hair samples can be performed, if necessary, under the guidance of forensic professionals. The other actions mentioned, such as identifying methods to lift or remove necessary evidence, taking photographs of the scene, and appropriately packaging or preserving the evidence, are all critical components of the investigation process. These actions ensure that evidence is collected thoroughly and documented properly, allowing for a clearer understanding of the case and maintaining the chain of custody.