VIDEO : Taylor Swift to Testify Against DJ Who Allegedly Sexually Assaulted Her

Monday marks the beginning of a nine-day trial in civil court for Taylor Swift, who's being sued by a radio DJ who claims she falsely accused him of groping her over four years ago. Swift alleged that he'd groped her while they were taking a photo. Following the incident, a member of Swift's team confronted him, and Mueller and his girlfriend, who was also in attendance, were escorted off the premise. Mueller sued Swift two years later in September 2015 for $3 million and claimed that her team called his boss following the encounter instead of the police and got him fired over what he says is as a false accusation. The trial is taking place in the U.S. District Court in Denver, Colorado, as the claim is over $75,000.