There’s bad blood between an Alameda County sheriff’s sergeant and protesters after he used a Taylor Swift song in an apparent effort to avoid an on-camera confrontation earlier this week.

Authorities say an investigation has been launched into Tuesday’s encounter between Sgt. David Shelby and members of the Anti Police-Terror Project, an organization that seeks police reform.

During the incident, Shelby — who was being filmed by protesters on the courthouse steps in Oakland — pulls out his cellphone and begins playing music while arguing with James Burch, the policy director for the Anti Police-Terror Project.

The move was seemingly to prevent video of the encounter from being shared on social media, which restricts content that contains copyrighted music.

Read the full story on LATImes.com.