Vienna Sterling is a teenage socialite and the girlfriend of Andrew Kenworthy, one of the rapists of her plus one at a nightclub, high-school loner Chloe Dutton. Vienna got in by stealing her sister Jenna's ID to appear of legal age. Dutton was taken to the hospital and received a rape kit, where she called Vienna, who called Kenworthy over "cheating on" her.
Kenworthy called the two other socialite rapists, Davis Harrington and Seth Wolfford III, with the fourth one responsible for setting up the gang-rape, Mitch Wilkens, present during the calls, kidnapping and killing Dutton and framing the other rapists for her murder. Vienna was interrogated and revealed Dutton's name, finding her "mature for" her age, but lying in saying she had no other contact with her after the club and gang-rape.
When the phone records were tracked, Vienna was arrested for obstruction of justice. From DNA samples and confessions, the three socialites confessed, and Wilkins was sentenced to death for Dutton's abduction-murder despite a failed frame job on Wolfford.
Vienna was found guilty on her charges and imprisoned. (SVU: "Soulless")