What is the aim of a preliminary investigation?

The aim of a preliminary investigation is to determine if a crime likely occurred. This initial stage is crucial in the criminal justice process as it helps law enforcement officials assess whether there is sufficient reason to believe a crime has been committed. During this investigation, police collect initial facts, interview witnesses, and gather any available evidence that can indicate whether there is a reasonable basis for further action.

Determining if a crime occurred allows investigators to establish whether to proceed with a more in-depth investigation or to focus their resources elsewhere. It is not about gathering evidence for trial yet, making an arrest, or formally charging someone with an offense; these steps come later in the investigative process, once there is a clear indication of criminal activity.