The document discusses several conventions that are commonly seen in the opening sequences of murder mystery films. These include depicting a murder, murderer, or detective; using tense music to build suspense; including clues; and developing characters. However, the murderer is unlikely to be revealed at the very start of the film to maintain suspense. It also provides the example of the titles seen at the beginning of the film Seven, and notes that title sequences generally follow the structure of showing more important credits first, then less important, and ending with the director.