Our Film Brainstorm

My group has decided and agreed that our opening two minutes will be a Thriller with parts which include the genre Horror.

Our Idea:
Four friends are represented as fairly close, however two friends don't seem to be getting along quite so well. Character 1 and character 2 organise to meet up to sort our their differences however, character 1 mysteriously gets killed leaving character 2 unaware of where she is and why she's not there. The other two friends who are presented as shady and quite. They are more involved with the disappearance than anyone else.

Characters: 
Tara-The victim of the murder.  -Played by:Nadiye Killick
Ellie-Friend who goes to meet Tara in a cafe. - Played by: Mae Fisher
Rosemary-Responsible for assault of Tara.  -Played by: Chloe Bennett
Bella-Tries to help Rosemary cover up the murder/partner in crime.  -Played by: Katy Welch

Props:
Phone for conversations and text messages
Plastic/Gun/Knife for murder scene
Fake blood and latex for wounds
Dog-murder scene/innocent dog walk

Ideas For Film Names:
We feel by using a short and engaging title it would make our film more effective and captivating.
Missing
The Dead
Murder Alley
Friendship Group?
Help

Techniques: 
Adobe Premier Elements
Video camera (GoPro)
Tripod
Photoshop(DVD front cover)