Read the following context and choose the best option to answer the question.
Context: Another cop car pulled in behind us . I got out and was told to wait a minute for someone to take my statement . A minute or two later , a sheriff came and took my statement about what we witnessed . Chad saw an officer make the drive walk the line , which Chad reports she did very well , considering how she was driving .
Question: Why is the cop so interested in the narrator ?
Options: 
- They view them as a potential perpetrator .
 - None of the above choices .
 - They view them as a witness .
 - They view them as a suspect .


They view them as a witness .