Shauna Scott is a police officer at the 12th precinct and the ex-girlfriend of Detective Marcus Bell.
|Shauna and Marcus dated for several months. However, Joan Watson discovered that Shauna was a plant for Internal Audit at the 12th precinct and told Marcus. Marcus was angry that Shauna kept this from him as it both compromised his position as a detective and placed doubt that he could trust Shauna in their personal relationship. After Marcus spoke to Sherlock Holmes and realized how lucky he was to have Shauna and how lonely he would be without her, he tried to make up with her. However, Shauna decided that she would work for Internal Audit full time and that she needed time away from their relationship. She did leave the possibility of getting back together with Marcus in the future. ("The Best Way Out Is Always Through")