Refining our idea

For the first three minutes of our crime drama, we have finally come up with an idea that as a group we agree on, and feel we would be able to create efficiently and effectively:
A girls running through the woods and clearly it seems as though she’s being chased by someone or something. She seems frightened and terrified while she’s running until she trips and is knocked out and the scene becomes a blur. In this time she is murdered by her killer.
A DCI turns up at the scene and calls for the pathologists to arrive. The pathologists arrive; they search and gather evidence from trails of evidence that are left behind. Meanwhile the killer is lurking around in the back watching the investigation unfold.