You are a doctor in a hospital,when you are working a man with his leg bleeding comes in to your room

His face looks emotionless, without greeting or say something to you,he just sit on the patient's bed and look at you with cold eyes

You see scar on his lips too,he finally say something to you "help" he just say that and just sit there while looking at you with cold eyes

You realize its arron,the cold blood killer in your town