Mr. Galligan had not seen the video before receiving it last school year, when he and Ms. Groves were seniors. By then, she was a varsity cheer captain who dreamed of attending the University of Tennessee, Knoxville, whose cheer team was the reigning national champion. When she made the team in May, her parents celebrated with a cake and orange balloons, the university’s official color.
The next month, as protests were sweeping the nation after the police killing of George Floyd, Ms. Groves, in a public Instagram post, urged people to “protest, donate, sign a petition, rally, do something” in support of the Black Lives Matter movement.
“You have the audacity to post this, after saying the N-word,” responded someone whom Ms. Groves said she did not know.
Her alarm at the stranger’s comment turned to panic as friends began calling, directing her to the source of a brewing social media furor. Mr. Galligan, who had waited until Ms. Groves had chosen a college, had publicly posted the video that afternoon. Within hours, it had been shared to Snapchat, TikTok and Twitter, where furious calls mounted for the University of Tennessee to revoke its admission offer.
By that June evening, about a week after Mr. Floyd’s killing, teenagers across the country had begun leveraging social media to call out their peers for racist behavior. Some students set up anonymous pages on Instagram devoted to holding classmates accountable, including in Loudoun County.
The consequences were swift. Over the next two days, Ms. Groves was removed from the university’s cheer team. She then withdrew from the school under pressure from admissions officials, who told her they had received hundreds of emails and phone calls from outraged alumni, students and the public.