What key objectives are sought through police interrogations?

The objective of police interrogations is primarily focused on learning facts and corroborating investigative theories. This involves gathering detailed information from the suspect that can confirm or refute existing theories related to the case. Effective interrogations are aimed at uncovering truthful information about the events in question, the suspect's involvement, and any relevant circumstances that might not be initially apparent. This process is vital for law enforcement agencies to build a strong case, support evidence, and ensure that justice is served.

In contrast, while obtaining a witness statement can be part of an investigation, it does not capture the essence of what police interrogations specifically aim to achieve in relation to suspects and their direct involvement. Training new officers is important for overall police work but is not a goal of interrogations. Intimidating suspects is unethical and counterproductive, failing to lead to reliable information, and can often undermine the integrity of the investigation. Thus, the focus on fact-finding and corroboration makes the identified option the most appropriate choice regarding police interrogation objectives.