You should have an original title that is merely not the subject of your paper. For example The Disappearance of Natalee Holloway would not be an acceptable title; it is already taken by the actual disappearance of Natalee Holloway. Titles should be creative, bordering on poetic, by using juxtaposition, hyperbole, onomatopoeia, alliteration, or other such technique borrowed from creative writing and literature.
You should have an interesting introduction/hook that leads your reader to a clear narrowed. What is the mystery you researched, and what are the main theories about it? This should be clear in your first paragraph, given the short page requirement: 1200-1500 words is about 5 to 7 pages, not including the Works Cited page.