What is the key difference between an interview and an interrogation?

The key difference emphasized in the correct choice is that an interview is primarily designed for gathering information, whereas interrogation is focused on eliciting the truth, often in a more confrontational manner. Interviews typically involve open-ended questions and aim to collect information from individuals who may have knowledge relevant to a case, such as witnesses or other parties. In contrast, interrogations are strategic processes that involve carefully structured questions intended to obtain a confession or uncover deeper truths from suspects, often using specific techniques to break down defenses and elicit more accurate responses.

The other options provide varying perspectives but do not accurately capture the nuanced differences between interviews and interrogations. While an interview can be informal, not all interrogations are strictly formal; some can have a more conversational tone, especially in initial stages. The assertion that interviews are conducted only with witnesses disregards that interviews can also involve suspects in certain situations. Lastly, claiming that both serve the same purpose and have similar procedures overlooks the distinct objectives and techniques involved in each process.