the man behind the man.
the three elements of a crime should be present ( motive, knowledge, and opportunity ) for the conviction of a person committed a crime.
It means that you either knew about a crime before it was committed or you participated in the planning of a crime. This term is now either, conspiracy or accomplice. Both terms carry long prison sentences
Could be - perpetrator, victim, witness or accomplice.
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.
Planning a Crime and Committing the crime
They are called the Coroner.
Criminal, perpetrator, suspect, person of interest.
To the best of my knowledge the professional person who investigates a crime where it was perpetrated is called "a crime on scene investigator".
That person would be an accessory to the crime. If the crime was planned by that person in addition to supplying the gun, then it would be conspiracy to commit the crime.Added: An Accesory Before The Fact. A person who procures or advises or commands the commission of a felony but who is not present at its perpetration
An accomplice is a co-conspirator or actor in the commission of a crime. A person who assists in the plan but does not carry out the crime is called a conspirator. A person who assists in the plan and carries out the crime along is an accomplice.
Extradition, or extraditing depends on if the person has been taken to the other state or not.
A person who participates in committing a crime but is not the main person involved is called and accessory. And example would be hiding cash stolen from a bank robbery that you did not participate in.