Victim
Someone who loves to read crime novels can be called a "mystery enthusiast" or a "crime fiction aficionado."
Nothing You Just Want Be Able Too Sleep Much AS You Would Like
There is no specific word for this.
It's called an accomplice, or a co-conspirator.
It depends on whether they think the person is part of the crime as well. If they do, then the person is called an accomplice... someone who helped the suspect commit the crime. If not, then the person is just an associate... someone who knows the suspect and might be able to identify where he or she is.
This will depend on your jurisdiction and your behaviour. Most places have laws against stalking and harassment, and if someone makes it clear that they do not want you to call, then you most likely will be breaking the law by continuing to call them.
antagonist
Depending on the circumstances, a person can be called an “accessory” to the crime, for harboring a fugitive. The person is an accessory to a crime if the person: Conceals or destroys evidence of the crime, or Harbors or conceals the person committing the crime.
aggravated robbery
a crime
In general, it is not a crime to give a false identity on the telephone, by itself. However, if you give a false identity in order to trick someone into giving you money, for example, that would be a crime.
mmm there's really no certain word but Crime Investigator is the closest I've gotten