That's the worst (you) I got in a while.
First of all, this 'argument' of yours is an appeal to extremes.
Second, I don't know what country you live in but generally speaking even if no one presses charges a murder will always be investigated and a crime record will be opened, as long as the person whose body is found has been murdered within a certain period of time (a crime from 2 centuries ago wouldn't warrant an investigation from the authorities).
What I'm talking about are minor crimes. Like a kid shoplifting or breaking a car's window. As long as the damaged part doesn't want to press charges, the police cannot prosecute the culprit. That's how it goes.
Please, use your common sense and don't compare tricking a receptionist to get into your twin sister's hotel room to meet her and the act of killing a person.