Hide you in the Dark

"Mariah just do it!" He shouts at me. I'm holding the gun with both hands and I can feel my hands sweating.
I raise a brow and turn to look at him with the gun facing towards him. "Shout at me again and I swear I will kill you." After that I quickly turn to the person in front of me and pull the trigger and shoot towards the head. The body falls lifelessly and I hear my best friend scream in horror and then proceeds to sob.
I never wanted this, but it's the price I have to pay to keep him alive.
I then turn my face towards Jess and she immediately flinches but can't control her sobbing.
"You're next." I say with an evil grin and I pull the trigger.