The next thing she remembers, she told the court, is waking up in the morning naked on a couch in an unfamiliar house. She covered herself with a blanket while she looked for her clothes. She testified she could not find her underwear, earrings or cell phone.
She testified she was "too embarrassed to ask what happened that night because I didn't remember."
The girl told the court she had a flashback memory of throwing up in a street somewhere sometime after she left the first party.
The victim was the 28th and final witness in a trial that has shone an unwelcome spotlight on Steubenville, a down-on-its-luck town of 18,400 residents along the Ohio River, and the Steubenville High School football team known locally as "Big Red."
A community divided
Critics have accused community leaders of trying to paper over rampant misconduct by players of the powerhouse "Big Red" football team and have suggested that other students took part in the assaults or failed to do enough to stop them.
During closing arguments Saturday, Hemmeter cast aside the outside attention that Anonymous helped bring to the case.
"This case isn't about a YouTube video. This case isn't about social media. This case isn't about Big Red football," she told the judge.
"This case is about a 16-year-old girl who was taken advantage of, toyed with and humiliated. And it's time people who did this to her are held responsible."
Earlier in the day, attorneys for Mays and Richmond challenged the credibility of the victim, calling two of the 16-year-old girl's former best friends to testify.
One witness, a 17-year-old, testified the victim told her she believed she had been drugged the night of the assault, an allegation the witness said she did not believe because the girl "lies about things."
A hospital test on the victim for drugging came back negative, testimony revealed.
The teen witnesses, who described themselves as classmates and former best friends of the girl, told the court they saw the victim drinking. She drank at least four shots of vodka, two beers and some of a slushy mixed with vodka, a 16-year-old witness said.
The defense attempted to question the two teens about the victim's history, but the judge did not allow most of the line of questioning. Ohio, like most states, has a rape shield law that limits the amount of information of an alleged victim's past that can be explored in court.
The 17-year-old witness said she picked the victim up the next morning from someone's home and asked her what happened.
In the car, the victim said, "We didn't have sex, I swear. I don't know what happened. I don't remember," the teen testified.
On Friday, three teens, all self-described friends of the co-defendants, testified that they saw Mays and Richmond engage in sexual contact with the girl. All three have been granted immunity from prosecution.
One of the witnesses -- identified as a 17-year-old Steubenville football player and wrestler -- testified that he used his cell phone to record Mays putting his fingers inside the girl's vagina during a drive from one party to another. He said he deleted the video the next morning when he realized it was wrong.
The teen also testified that Mays later attempted to have the girl perform a sex act on him in the basement of a home.
"She didn't really respond to it," he said.