So long as both parties are willing to enter into the transaction, where is the victim? A more nuanced view is that perhaps the prostitute does not really want to be there, but is compelled to work as a prostitute by economic necessity or a pimp. But if both parties are legally adults and reasonably in a position to decline to enter into the agreement if they do not wish to do so, then its hard to see a victim.
a victimless crime
A victimless crime is a term applied to a crime which generally has no direct victim, (e.g.: as in the crime of illegal possession of drugs). Victimless crimes must be truly victimless. In many ways, a false statement offense is considered a victimless crime, but in which, society at large becomes the victim. The victim, for purposes of a victimless crime, is the societal interest that has been harmed.
is hacking that does no direct damage a victimless crime
Drugs, Gambling, Prostitution, and Euthanasia
I believe the questioner means PRE-MEDITATED Murder - meaning that the event was purposely planned in advance of it happening.
Victimless crime
Underground prostitution is much more dangerous than legalized prostitution. With legalized prostitution, prostitutes have the protection of the police in case of violence from clients or "managers" (pimps). The clients also have protection against disease with regular testing and licensing of legal prostitutes. Police could also focus their efforts toward violent crimes instead of arresting people who are engaged in a victimless crime.
when a crime was commited and they can't find the victim
Statistically there is none - because no one has ever complied a comprehensive list of so-called "victimless crimes" or described what they are.
Prostitution is not considered a federal crime in the United States. It is typically regulated at the state and local levels.
Vice crimes are normally referring to prostitution.
A crime that does not have any victim. The most common is prostitution.