jǐng chá / pán dǐ / le / nà gè / xián yí rén / bàn tiān / zhōng yú / wèn chū / le / shí qíng

警察盘底了那个嫌疑人半天，终于问出了实情。

The police interrogated the suspect for a long time to get to the bottom of it, and finally extracted the truth.