While the guys are trying to get rid of the dead body, Christian Slater's character is asked incredulously "Have you ever done this before?" The same thing was asked of him in Heathers (1988) when he is trying to cover up an accidental suicide that he manipulated. In both films, he hears the question, then pointedly does not answer it.
The trivia item below may give away important plot points.
PREMIERE magazine had famed attorney and Harvard Law Professor Alan Dershowitz discuss the legal issues raised by this film (along with other late-1990's movies with criminal law material). Dershowitz said that the killing of the prostitute in Las Vegas was either manslaughter or an accidental death where no charges would be filed, although Jeremy Piven's character (as well as the other party goers) would be in serious trouble if he was tested for drugs and alcohol, and that the presence of those substances would be a separate legal matter. Dershowitz added that "of course" all of the characters would face first-degree murder charges anyway, after the security guard was stabbed and kept from leaving the hotel room until he died.