"Interrogator": "Okay. So how did the killer convey the message that you should not tell this to anyone to the man?", 
"Interrogee": "So when the man notices that someone has watched him killing someone, then he takes out his gun and points it at the man who was taking out the garbage. Then he says, "You have seen me murdering someone, and if you want to live, you will tell this to no one. We will have a deal." Then the man goes, and yeah, that's what all the conversation they had."