2.2 Re-evaluating the statements

You know now that a question can suggest a response, that the co-witnessing effect tends to make evidence from two witnesses very similar, and that people tend to judge height and weight badly as the judgements are made relative to their own build.

To help you evaluate the statements taken by DI Bullet, in the next activity you look at potential ways that evidence can become biased. For each question, you will be provided with a specific statement that was obtained by DI Bullet in the audio you heard. Your job is to decide whether the statement is likely to have been biased by one of these three factors:

• Biased as it was suggested by the question asked – for example, did DI Bullet ask a question in a way that suggested what the answer should be, or suggest information to the witness that they had not mentioned before?
• Biased because of the co-witnessing effect – did the witness remember the information themselves, or had they heard another witness say something similar?
• Biased as witnesses tend to over and underestimate height, weight, distance and time.

Alternatively, the evidence might not have been influenced by any of the above factors, in which case you should select:

• Potentially unbiased.

The statements that appear in the quiz are all taken from the recording of DI Bullet you heard in DI Bullet: initial statements. Do feel free to re-listen to this audio as many times as you like.