We thought of a few different titles for our film that were both relevant to the storyline and sounded good, we didn't want a title that was too long like the 1965 film The Lemon Grove Kids Meet The Green Grasshopper And The Vampire Lady From Outer Space.
We decided on a snappier title, (after admiring se7en and other existing crime films). Some ideas were as follows:
Mysterious Killer
Mysterious Stranger
The Hunted
A Few Feet Below
Ariel
The Piercer
Untraceable
9mm
The Enemy
In The Woods
Watcher