Evidence Collection Process Flashcards

A forensic nurse is collecting clothing from a victim of sexual assault. The victim's shirt is damp with suspected biological fluid. Which of the following actions is most appropriate for preserving the evidence?

Answer: Allow the shirt to air-dry completely before packaging it in a paper bag.

Wet or damp evidence, especially clothing with biological fluids, must be air-dried before being packaged. Packaging moist items in plastic can lead to mold, mildew, and bacterial growth, which can degrade or destroy DNA evidence. Using heat to dry the item can also damage the evidence. Each item should be packaged separately in a paper bag to prevent cross-contamination.

When documenting a patient's account of an assault, what is the most critical principle for a Certified Forensic Nurse to follow?

Answer: Record the patient's statements verbatim, using quotation marks.

Forensic documentation requires objectivity and accuracy. The nurse should document the patient's statements exactly as they are made, using quotation marks for direct quotes, without interpreting or paraphrasing them. This ensures the patient's own words are preserved, which is crucial for legal proceedings.

A patient arrives at the emergency department after a physical assault. To preserve potential trace evidence on the patient's hands, what is the forensic nurse's initial priority before conducting a detailed examination?

Answer: Cover the patient's hands with paper bags.

To preserve fragile trace evidence such as fibers, hair, or DNA under the fingernails, the patient's hands should be covered with paper bags. This action prevents the loss or contamination of evidence before it can be systematically collected. Washing hands would destroy the evidence, and while photos and scrapings are important, protecting the evidence from loss is the immediate priority.

Which of the following is the primary purpose of maintaining a strict chain of custody for forensic evidence?

Answer: To guarantee the admissibility of the evidence in court.

The chain of custody is a legal document that tracks the possession of evidence from the moment of collection until it is presented in court. Its primary purpose is to ensure the integrity of the evidence by demonstrating that it has not been tampered with, altered, or substituted. A broken chain of custody can render evidence inadmissible in legal proceedings.

A forensic nurse is obtaining informed consent for an evidentiary examination. Which of the following elements is essential to include in the consent process?

Answer: The specific law enforcement agency that will receive the evidence.

Informed consent for a forensic exam must include informing the patient about what evidence will be collected, if photographs will be taken, and which agency (e.g., a specific police department) the evidence will be released to. This ensures the patient understands the process and the destination of the collected evidence. Guarantees of legal outcomes, names of lab staff, or trial timelines are not part of the forensic nurse's role or the consent process.

When collecting biological samples, such as from a bite mark, what is the recommended technique to avoid contamination?

Answer: Change gloves frequently and use separate sterile swabs for each distinct area.

To prevent cross-contamination, forensic nurses must change gloves often and use separate, sterile collection tools (like cotton-tipped swabs) for each piece of evidence or anatomical location. Using the same swab or gloves for multiple sites could mix DNA from different sources, compromising the integrity of the evidence.