The movie is a documentary created by Kurt Kuenne, to honor his murdered friend, Andrew Bagby and to serve as a memory scrapbook for his friends, family and future son. Kurt travels around the United States, interviewing all of Andrew's former friends. However, the documentary also tells about a child custody battle between Andrew's family and his ex-girlfriend/mother of Andrew's son (who also murdered Andrew).
I don't want to give too much information and I know that description was terrible but it's definitely a movie you just need to see. And like Battle Royale, you can also find this movie on YouTube.