Unfortunately, the dialogue has a large number of obscenities and crude sexual comments. Cassie seduces Sam in a graphic sex scene, although no nudity is shown. A video of Richard also shows a graphic sexual encounter. A schoolmate, attracted to Justin, shows him nude paintings of herself. Richard also buys marijuana from the janitor and drinks illegal alcohol with Justin. Some graphic violence occurs on screen as a monkey attacks and bites Cassie’s arm, showing a bloody mouth, and a graphic shooting occurs as well. Other scenes strongly suggest gruesome violence, such as cutting a finger from the corpse. However, both Cassie and the boys learn that they have to face up to what they’ve done in the past. MURDER BY NUMBERS earns its R rating with sexual content and obscenity-laced language.