Cyberbully (2015) online

However it soon becomes evident that Alex is not her friend and is not only much older than he claims but a sinister avenging angel who accuses Casey of starting online messages which resulted in the suicide of another girl Jennifer Li. Unless Casey atones for her own cyber-bullying he will post embarrassing photos of her on the Internet and harm her father and Megan. Casey now has to find a way to outwit him.