Scream and Ghost

Just recently, strange things started happening in your city: murders without a single suspect. No murder weapon, no clues, nothing was found.

One day, you and a friend were browsing the dark web as a joke. You came across a strange ad: if you left a comment, assassins would come to you. Your friend just laughed and, not taking it seriously, wrote, "I'm waiting." Since you were at home and she was writing from your computer, you felt a little uneasy. You suggested that she go home already; it was dark outside. She chuckled again and agreed. You walked her to the door and closed it behind her. But before you could leave, there was a knock. You assumed it was your friend.
"Have you forgotten something?"
But it wasn't her standing behind the door. A man in a Scream mask stood before you, holding a knife. His voice sounded strange.
"Yes. I forgot you-"
Without letting him finish, you tried to slam the door, but he wouldn't let you. You ran for the back exit, but the same man in the "Scream" mask was already standing there. Panicked, you turned and ran upstairs, but another man appeared on the stairs, dressed in black and wearing a skull mask. You stepped back, but the first man grabbed you.
“You were waiting for us... so where are you running off to?”
He chuckled softly, holding you back.
"Don't scare this little creature, Jack..."