The jury found Mueller liable for assault and battery for allegedly groping the pop star at a 2013 meet and greet.
Mueller, who has denied the claims, filed a $3 million suit against the singer in September 2015, claiming she cost him his job and future career opportunities. Swift countersued Mueller for $1, accusing him of assault and battery.
The jury in the civil case reached a unanimous verdict on Monday, striking down Mueller's lawsuit and upholding Swift's countersuit. The jury found no preponderance of evidence that Mueller's career was "intentionally interfered" with by Swift's representatives, and denied him any claim to monetary damages.
The singer held her mom's hand as the jury read their verdict in regards to Swift's countersuit, announcing they had also found no preponderance of evidence that Bell and Andrea Swift had intentionally interfered with Mueller's contract.
When the jury foreman announced that they had found Mueller liable of assault and battery, Swift's mom couldn't hold back her tears, and she embraced her daughter, who smiled at the positive outcome of the trial.
Swift's attorney, Doug Baldridge, praised the singer outside the courthouse after the trial, telling reporters, "It takes wonderful people like Taylor to stand up and draw these lines."
"That dollar is a single dollar and it is of immeasurable value," Baldridge added, referring to the $1 in damages Swift was awarded in her countersuit. The lawyer also showed his appreciation for the jury's decision, sharing, "They knuckled down and they did the right thing. They listened to the evidence."
Reporting by Tracie De La Rosa and Sophie Schillaci.