A judge has dismissed a former Denver DJ’s case against pop superstar Taylor Swift just before jurors were due to hear closing arguments in duelling lawsuits over whether he groped her during a meet-and-greet event and she and her team ruined his career.

US district judge William Martinez determined that Swift could not be held liable because David Mueller had not shown that she personally set out to have him fired after the pre-concert backstage photo opportunity in 2013.

But Mr Mueller’s identical allegations against Swift’s mother and her radio liaison will go to the jury for a verdict.

The circus outside the high-profile trial. (David Zalubowski/AP/PA)
The circus outside the high-profile trial. (David Zalubowski/AP/PA)

The singer-songwriter became tearful as the judge read his decision, saying there was no evidence that her actions were insincere.

Afterwards her team smiled and embraced. Mr Mueller’s side did not speak.

Mr Mueller, who denies groping Swift, sued the Swifts and their radio handler Frank Bell, seeking up to three million dollars’ compensation (£2.3m) for his ruined career.

Swift, 27, said in her countersuit that she wanted a symbolic dollar and the chance to stand up for other women.

Taylor Swift's legal team. (David Zalubowski/AP/PA)
Taylor Swift’s legal team. (David Zalubowski/AP/PA)

With jurors outside the courtroom, lawyers on both sides had argued over whether Mr Mueller had presented enough evidence to send his full case to the jury.

Those statements and the judge’s questions focused on whether Swift herself had done anything to get Mueller fired.

It came after days of evidence from the singer and others.

Swift spent an hour on the witness stand on Thursday, defiantly recounting what she called a “despicable and horrifying and shocking” encounter.

“He stayed attached to my bare a**-cheek as I lurched away from him,” she said.

“It was a definite grab. A very long grab.”

Greg Dent, former security guard for pop singer Taylor Swift. (David Zalubowski/AP/PA)
Greg Dent, former security guard for pop singer Taylor Swift. (David Zalubowski/AP/PA)

Swift’s testy exchange with Mr Mueller’s lawyer occasionally elicited chuckles, even from the six-woman, two-man jury.

She got a laugh when she said bodyguard Greg Dent saw Mr Mueller “lift my skirt” but someone would have had to have been underneath her to see the actual groping – “and we didn’t have anyone positioned there”.

Swift said that after the photo was taken she tried to get as far away from Mr Mueller as she could.