Haunted World on Instagram: "In 1999, Caroline Reid Robertson (19 years old) killed Rachel Barber (15 years old), a successful and beloved girl in Melbourne, Australia. Caroline used to work as Rachel’s babysitter, but she was obsessed with her and envied her life. On February 28, she called Rachel and told her she could earn 100 dollars if she participated in a “psychological study,” and asked her not to tell anyone. On March 1, Rachel went to Caroline’s apartment, where she betrayed her and st