The senior colonel was frustrated. With the current amount of evidence, he couldn't register this case to court. Hence, he could only ask her for questioning and not interrogate her. These two terms meant similar things but there was a huge difference between them.
Initially, he thought he could scare the evidence out of Ling Lan since she was young and inexperienced. Yet, she was surprisingly well-seasoned. A single sentence from her placed them on the passive side.
Since Ling Lan asked, the senior colonel had to reply. "This is just a questioning. My men are just too passionate about their job. If they did anything wrong, please forgive them."