Found

Based on the novel by Todd Rigney, "Found" centers around Marty, a shy, bullied fifth-grader who takes refuge in horror films... until his life turns into one. After finding a human head in his brother's closet, Marty fears for the safety of his family while making a desperate effort to reconnect with Steve, the big brother whose homicidal cravings threaten to destroy life as Marty knows it. - IMDb