Violet

Violet is a 2014 coming-of-age drama film written and directed by Bas Devos in his feature directorial debut. Starring Cesar De Sutter, Koen De Sutter, Mira Helmer, and Raf Walschaerts, the film follows Jesse, a 15-year-old boy who witnesses his best friend Jonas stabbed to death at a shopping mall and must tell his family and friends what happened.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.