…mastuebate to a picture of his dead mom????

i saw this movie about a year ago. It was an English movie, American. I believe it was on Netflix. It was in color.
A guy killed his family then he was enrolled into military school where some bullies stripped him down in the shower and made him masturbate to a picture of his dead mom. Then the movie shows like how and where he killed his family and it was Ina house with all white stuff. Then he tried to kill him self but didn’t succeed… What is it??????