Where?

The severed slaughter graph

Now the symbol  is created , I know need a place on the body my killer (Trevor Emanuel ) is going to leave it. There are many places to put this "slaughter graph" but the question is where?

Body temperature

Body temperature can show ones mood . Different emotions can create heat patterns in different
 parts of the body.Trevor could leave his mark on body parts that show a clear emotion. From the scale above , sadness show clear heat on the face and chest. Surprise also shows a similar effect and also envy.
I could create the mark on the chest and face but it , if on the chest it will not be visible and my actress may feel uncomfortable drawing her face.


The ring finger

The ring finger is the fourth finger on the left hand . Before scientific discovery it was believed that the vein in this finger directly connected to the heart. Trevor could leave his mark here as it is significant to love in which he will never receive , only had.




Wrist

There is no theory behind using the wrist only that it is on show. I had this idea from watching Constantine and Halloween where the two characters had a marking on. This could also link to how people slit their wrist to bleed out in attempted suicide.



Conclusion- I have decided to use the wrist as it is visible and easy to find , it could also be used to look like attempted suicide.