What is the purpose of a custodial investigation?

The purpose of a custodial investigation centers on the questioning of an individual who has been taken into custody. This process is crucial for gathering evidence and information regarding the individual's involvement in a crime or any related matters. During such an investigation, law enforcement officers aim to obtain statements and insights from the suspect, which can be significant for building a case and preparing for prosecution.

It is important to understand that this step occurs after an individual has been formally detained and is in custody, ensuring that the suspect's rights are upheld during the interrogation process. This includes informing them of their rights, commonly known as Miranda rights, to ensure that any statements made are admissible in court. The other options presented relate to different aspects of the criminal justice process, such as apprehending suspects, arranging trials, or filing charges, but do not specifically represent the focus of a custodial investigation.