OACP Observation and Memory Skills 4 — Questions and Answers
Question 1: You observe a suspect fleeing on foot who is wearing a red jacket, blue jeans, white sneakers, and a black backpack. Which detail is most useful for broadcasting a description to other officers?
- The color of the sneakers
- The combination of the red jacket and black backpack (Correct answer)
- The style of jeans worn
- The suspect's approximate running speed
Correct answer: The combination of the red jacket and black backpack
Combining two distinctive color contrasts (red jacket and black backpack) provides the most memorable and actionable description for other officers scanning a crowd.
Question 2: During a witness interview, a person says they 'definitely' saw the suspect's face clearly but the incident occurred at night under minimal lighting. The officer should:
- Accept the description as fully reliable since the witness is confident
- Note that confidence level does not guarantee accuracy under poor lighting conditions (Correct answer)
- Discard the witness statement entirely
- Assume the witness is fabricating details
Correct answer: Note that confidence level does not guarantee accuracy under poor lighting conditions
Witness confidence is not a reliable indicator of accuracy, especially when environmental conditions like poor lighting would have impaired perception.
Question 3: An officer must recall the sequence of events at a crime scene for a report written six hours later. The most effective strategy during the scene assessment is to:
- Rely on natural memory without taking notes to stay focused on observation
- Make brief written notes immediately, capturing sequence and key details (Correct answer)
- Photograph everything and skip mental encoding
- Wait until returning to the station to reconstruct events from memory
Correct answer: Make brief written notes immediately, capturing sequence and key details
Memory fades rapidly; brief contemporaneous notes preserve sequential accuracy and support accurate reporting later.
Question 4: When estimating a suspect's height at the scene of a vehicle stop, the most reliable reference point is:
- Comparing the suspect to the officer's own height during the stop
- Using the vehicle door frame or roofline as a fixed reference (Correct answer)
- Asking the suspect to estimate their own height
- Comparing the suspect's height to nearby trees
Correct answer: Using the vehicle door frame or roofline as a fixed reference
Fixed structural references like a vehicle door frame provide a consistent, measurable benchmark for height estimation.
Question 5: A witness reports seeing a license plate but can only recall the first three characters: 'BKT'. What memory phenomenon best explains partial plate recall?
- Flashbulb memory
- Primacy effect (Correct answer)
- Confirmation bias
- Retrieval-induced forgetting
Correct answer: Primacy effect
The primacy effect means items presented first (the beginning of the plate) are more likely to be retained in memory.
Question 6: During a foot patrol, an officer notices a vehicle parked in the same location for three consecutive days with a cracked windshield and expired registration sticker. The officer should:
- Ignore it as a civil matter
- Record the observation with dates and vehicle description for pattern analysis (Correct answer)
- Immediately tow the vehicle without documentation
- Assume the owner will return and take no action
Correct answer: Record the observation with dates and vehicle description for pattern analysis
Documenting repeated anomalies with specific dates and descriptions supports pattern analysis and potential investigative follow-up.
Question 7: Which technique is specifically recommended during the OACP cognitive interview to enhance a witness's memory recall?
- Asking leading questions to guide the witness toward the expected answer
- Having the witness mentally reinstate the environmental and emotional context of the event (Correct answer)
- Interrupting frequently to clarify facts in real time
- Presenting photo lineups before the verbal account is complete
Correct answer: Having the witness mentally reinstate the environmental and emotional context of the event
Context reinstatement — mentally returning to the sensory and emotional environment of the event — is a core cognitive interview technique that improves recall accuracy.
OACP Observation and Memory Skills 4
You observe a suspect fleeing on foot who is wearing a red jacket, blue jeans, white sneakers, and a black backpack.
Which detail is most useful for broadcasting a description to other officers?