Amy Bergen is the best friend of Cynthia Wilmont, who accompanied her during parties the "cool" kids at their schools. At those parties, girls would receive drinks and drugs from Cynthia's boyfriend Tommy Kessler and his friend Nick Radsen in exchange for sexually gratifying the boys. Even teacher Ross McKenzie would provide the party materials and have sexual contact with the girls at the party.
When Cynthia was raped and alter treated at a hospital for a battery shortly after, Amy was questioned and she revealed the parties. After eliminating McKenzie, Cynthia finally admitted Nick raped her when she said no, and that Tommy set it up out of wanting to command everything he and Nick wanted from her. When Nick contracted gonorrhea from Cynthia, Nick beat her and pushed her down the stairs. All guilty parties were arrested in the end. (SVU: "Popular")