Heard left the other woman with rope burn after ripping a necklace off, the last-minute witness claimed.
Another last-minute witness was summoned to the Johnny Depp defamation trial on Wednesday, to testify she had witnessed Amber Heard in a fight with another woman.
Airport worker Beverly R. Leonard told the court, via video link from her home in Arizona, that she had witnessed an altercation at Sea-Tac International Airport in 2009.
"I was in baggage claim area, and observed her with a traveling companion, and they got into an altercation where Ms. Heard had grabbed her traveling companion and pulled something from her neck," she told Depp's attorney Camille Vasquez.
"At that point I got up and tried to break up what appeared to be a fight. And I summoned a colleague to help me. And I stepped in between them and separated them, stopping any further injuries or escalation."
Asked to describe the interaction, Leonard said Heard was "aggressive towards her traveling companion."
"She had reached up and grabbed her arm and pulled a necklace off of her, and I observed her having it in her hand," she recalled. "She seemed to be not very steady on her feet, her eyes were blurry and watery, and I could smell alcohol."
As for the female companion — who was not identified — Leonard said "she raised her hands in what appeared to be a defensive manner."
"But other than that she was pretty stoic, and didn't really respond much. He stature was two or three inches taller than Ms. Heard, so she didn't really need to have to defend herself," she added with a chuckle.
After she intervened, Leonard said Heard was "somewhat dismissive" to her.