Réponse :
A private investigator is looking for serial killer .
On the wall he sees a finger print .
And on the ground, he sees that it is a bullet .
But the victim did not die by a gun but by a dager .
The Private investigator believes serial killer shot before fleeing .
Using bloodstains at the scene of the crime, the serial killer was identified and handcuffed.
Currently the serial killer is in prison .
