Answer:
Eyewitness Testimony.
Explanation:
The term eyewitness testimony is a legal term that is used for the people who give an account of a certain event witnessed by them. This person can be the bystander or the victim himself. The account given by the eyewitness is usually descriptive. The person is required to describe the event in detail of how it started and what happened afterward. Eyewitness testimony includes crime details, perpetrator's identification, etc.
In the given context, the testimony of eyewitness is questionable because Suzi is not able to memorize the face of the perpetrator.
So, the correct answer is eyewitness testimony.