Weng points out that if the detective investigating the crime had taken note of the position and orientation of the fingerprints, it would probably have helped the investigation tremendously.
翁景惠指出，如果當時外勤偵察時，不只是單純地採下指紋，而是更進一步的由指紋所在的位置、指尖所指的方向來判定是不是自然留下的指紋，後來對案情的幫助應會更大。