There's No Internet

Pretending to be asleep, doesn't works.

  A young boy is sleeping in his bed on a usual night. He hears footsteps outside his door, and peeks out of his eyes to see what is happening. His door swings open quietly to reveal a murderer carrying the corpses of his parents. After silently propping them up on a chair, he writes something on the wall in the blood of the dead bodies. He then hides under the child's bed.