How you approach the situation depends on how much evidence you have supporting any wrongdoing. You will have to handle situations that are based on strong suspicions differently than you would those with clear evidence.  For suspicions, it's best to present what you suspect in a non-confrontational manner and try to tease out the truth during the interaction. For evidence-based accusations, you should state your claim and present the evidence that you have. In these cases, there's little room for the person wiggling out of the responsibility. Lay out the facts you know by telling the story from your perspective. The person may interject and correct you on part of the story if there’s a detail that is wrong. This may give you a partial confession. You can also deliberately change part of the story to entice them to correct you. For instance, you could say, “So you went to the bar last night,” even though you believe they went somewhere else incriminating. This may prompt them to correct you, which could lead you to the truth. Ask the same question over again in different ways. Be mindful of them saying the same phrases when answering, as this could indicate they’ve rehearsed what they’re going to say. They may also be inconsistent with their answers, which could show they are lying. You could also ask them to tell their story starting from the end and leading up to the beginning or ask them to start in the middle. Relaying the story back may cause them to create errors in their story, which could show they aren’t telling the truth. The language you use can play a huge role in whether a person tells you the truth or not. Using language that implies fault may cause the person to withhold. Selecting less harsh words can encourage the person to tell the truth. For instance, use the word “took” instead of “stole” or “spent time with someone” rather than “cheated.” The person may be more apt to admit guilt if you use more favorable language. Bluffing is a dangerous, yet often effective, tactic. It involves you...

TL;DR in Vietnamese:
Phân biệt giữa sự buộc tội dựa trên sự nghi ngờ và dựa trên bằng chứng. Kể ra câu chuyện của họ. Thay đổi mọi thứ. Lựa chọn từ ngữ một cách cẩn thận. Bắt nọn, nếu cần thiết. Tránh dùng vũ lực.