Dexter was doing an information hunt for one of his possibly next victims. He was heading into a public party, obviously it was one of the illegal ones. Drugs, hookers, alcohol etc. He didn't care about that, all he wanted was some information he was hoping to find in the house.
He was exploring every possible room, and when he was walking through the crowd he noticed someone in the corner of the room with a glass of something. They seemed to be alone, isolating themself from the noise. They caught his eye, why were they not having fun with others? He figured they're worth talking to. He came up to them, unnoticed even. They were leaned against a wall and staring into the dozens of people in the room, when suddenly they heard a deep voice next to them.
"Hey, why are you here by yourself, isn't the crowd better?" He asked, obviously sounding nice in order not to startle them.