Just as Sia and HK stood up intending to leave, Mr. Huo suddenly spoke "I forgot to mention one thing"
Turning around Sia asked "And what is that?"
"There is one thing I find weird. When I called my girlfriend for the second time that day, she seemed to be going in a cab"
"We have checked your girlfriends activity but found no booking for a cab" HK answered patiently while Sia observed him quietly
"That is what the weirdest part. My girlfriend is extremely cautious. She never books for a cab when she is alone. She usually uses subways and always choses the crowded road to go home since that's the only way she feels safe. But that day she was clearly going in a cab"
"Did she tell you that personally?"
"No, I guessed it based on the background noise. The were sounds of cars honking and driving past, and the sound of wind whistlings. There was no sound of people or announcements like in the subways"
