Tom was sitting in the living room, playing with a pen as he stared blankly at the wall. He was in his mind palace, slowly but surely connecting the dots and solving the case. There was one thing missing... He got up and went to his desk which consisted of mini-lab. He put on latex gloves and took the scarf of the victim. It surely had some sort of clue!

He slowly took a sample of hair from the scarf and started working on it, when the door opened. He looked up at his flatmate and friend raising an eyebrow.

"I almost figured out the case. If I can simply finish it off with a DNA extraction, I could prove up that the scarf was originally worn by the murderer and not the victim!" He said, looking back at his work. "And how was your day?"