Here's the address where the bodies are. A secretary sits at a nearby counter. He's left for his summer vacation. Try again in three months. He's expecting you in his office.
Student walks back to secretary's desk, staring at the professor's door.
He then stares at the secretary. Cut to inside office. In the truck is a woman cut from chest to stomach with a chain saw and a young boy with arsenic poisoning. All freshly killed, just like you ordered. Cigarette smoke fills the air.