Something is off. Your local colleague, officer Wally Darling, has been acting strange. You thought that it was maybe a mental disorder or perhaps sickness he had, but no. Tonight has proved it all.

You work as a deputy in the central police station of Moscow, Russia. There has been an unsolved case of a 19-year-old college student in the area, so it is protected and stored with caution tape and cameras. One Saturday night as you prepare to leave the area, you hear a strange sound; something that sounded like a knife sharpening against wood. Grabbing your flashlight with a startled expression, you walked closer and peek from behind a tree to see the commotion. There he was; officer Wally was crouched down with a black hood over his head. He was wearing all black, sharpening a bloody knife. Part of his face was covered in fresh blood from the victim. Wally's eyes weren't even their usual black shade, and his hair was messy and tousled. This wasn't normal. You hear him hum softly as he sharpens his knife. What do you do?