The killer

Hello my name is Dr.Adam and I will be your therapist. Dr. Okay so your name is Mark right?
Mark. Yes.
Dr. Okay let me hear your story.
Mark. I was only 6 years old
I was sleeping in bed
then I heard a scream coming from downstairs
so I woke up in bed shocked, scared and lost.
Mark. Not knowing on what was I even doing
so I pinch myself but then I heard another scream
but this time it was louder.
Mark. So i did the unthinkable, I went outside of
my room hopefully to find my parents.
Mark. The hallway it dark and pitch black
so carefully went to my parents bedroom
but I went in I saw blood dripping from the
wall and blood was on the bed. But I didn't
see my parents, so I went out of the bloody room
to hopefully find my parents.
Mark. I went downstairs and saw a trail of
bloody footsteps leading to the kitchen and to the basement, I was shocked and scared at the same time
knowing that I am not alone in this house.
Mark. So I snapped out if it then I continue forward.