The singer-songwriter then countersued for assault and battery, alleging that Mueller put his hand under her dress and grabbed her during a meet-and-greet photo shoot. Mueller attended the show with his then girlfriend Shannon Melcher who also worked at KYGO.
"It was not an accident, it was completely intentional, and I have never been so sure of anything in my life", Swift said in a deposition. Two days later, he was sacked from KYGO - and two years later, he sued Swift claiming what he asserts was a false accusation caused him to lose his $150,000 a year job.
The Associated Press reports jury selection is set to begin today for both sides in their dueling lawsuits.
In addition to Swift, Mueller named her mother and a member of her team as defendants in the lawsuit.
It's unclear when Swift will take the stand.
Swift is seeking a verdict that awards her $1, while holding Mueller responsible and "serving as an example to other women who may resist publicly reliving similar outrageous and humiliating acts", her lawsuit says.
Taylor is now expected to testify in the civil court this week, with opening statements thought to begin on Tuesday, according to the Hollywood Reporter.
She didn't call police immediately.
Mueller said Swift was cordial as he and his girlfriend left.
Musician Taylor Swift performs onstage during the 2017 DIRECTV NOW Super Saturday Night Concert at Club Nomadic on February 4, 2017 in Houston, Texas.
The questionnaire also asks potential jurors if they listen to KYGO, the country music station where Mueller used to work. Mueller was removed from the concert after security guards tracked him down, and Swift's team gave the photo to the station. Swift brought these claims to the courts and stated that Mueller touched her inappropriate when the pair were taking a photograph backstage at one of the singer's concerts. The suit says Mueller complimented Swift on her "patience and sincerity with her fans" as they met.
"Ms. Swift knows exactly who committed the assault-it was Mueller-and she is not confused in the slightest about whether her long-term business acquaintance, Mr. Haskell, was the culprit", the documents read.
Swift and Mueller are both expected to testify, along with Mueller's former boss and members of Swift's entourage. The AP says the trial could last about two weeks.
According to TMZ, 32 seats will be open to the public for those interested in the trial (the case has predictably drummed up plenty of buzz among Swift's fans and locals).
Instead she called his boss.
Mueller's attorney, Gabriel McFarland, argues that Mueller may have been misidentified after someone else touched Swift.