Xiaotao remained silent for a long time, perhaps shaken by my discovery. Bingxin and I remained in the kitchen to continue our investigation. A few minutes later, Xiaotao returned smiling, "Song Yang, you’re wrong this time!"

In her hand was a photo from the living room taken by the wife, showing another fruit knife which was the murder weapon.

"I found this in their photo album,” she clarified. “Looks like your spider-sense is off! The murder weapon does belong to them!"

I stared at the photo and insisted, "But there were apples in the fruit bowl then!"

Xiaotao shook her head firmly, "It’s a fruit knife, and that’s all that matters. Generally speaking, most people distinguish between different types of knives and their specific uses, even more so for a fruit knife."

Xiaotao and I were at odds, trying to prove each other wrong, and the winner...