Copyright helps creators to protect their works from being used without permission. However, this right can also be abused. According to Los Angeles activist Sennett Devermont, a Beverly Hills cop used copyrighted music to prevent being filmed, perhaps hoping to trigger copyright filters. While the true motive remains unconfirmed, this isn’t an isolated incident.
Source: Are Cops Playing Music While Being Filmed to Trigger Copyright Filters? * TorrentFreak