Trap for birds

Cold Petersburg. A dull creaking bus doors. Forty-two stops. Passengers come in and out. Rhythmic and endless cycle. And nobody cares about the girl who sits in the back seat, leaning against the window. She fixed. She's dead. Later, a criminal expert says sparingly: a girl was killed by a professional. Coolly and precisely, he plunged into her body the knife, which caused instant death. And no leads. The only questions. And gusty wind from the Neva, walking on wet areas and scolding mortal anguish...