I called Dali over to the station, but his reluctant reply was, "Business is busy. I don’t have the time!"

"Come down to the station now!” I urged. “Something’s happened!"

While waiting for Dali, I checked on the computer. Luo Youyou's family was from Yuzhou, and there was only one train going to her hometown at 1:00 am tomorrow. That is to say, she was probably still in Nanjiang City.

At this moment, Bingxin came running in, "Song Yang-gege, I’ve tested it. The substance left on the victim’s skin is deuterated water."

"Heavy water?" I muttered.

Heavy water was a colorless, tasteless chemical substance, which was much heavier than water, hence the name. Since human skin was permeable to water, the water in the cells would be squeezed out...