Shtisel (2013)

S2E6 The Sleepover

Lilly revisits a murder case from 1990 when a prep-school girl was discovered dead in a nearby swimming hole, spurred by the recent discovery of another victim bearing similar markings in the same location. As the investigation unfolds, it becomes clear that the girl from the past was frequently bullied by three classmates who had invited her to a sleepover on the night of her death.