However, that lady did not accept my comment. In her words, in the past three years after their marriage, her husband never forgot to call her around 6:30 unless they were together. So, this lady insisted that there was probably something happened and she wished us to help her.
Therefore, as a policeman, I could not refuse this. After a brief note about this lady, I asked for help from my colleagues because I was a green hand that time. My colleagues also called the lady's husband while there was no answer. In addition, the lady told us she has called her husband's co-workers. The co-workers said they have witnessed her husband had left the office and drove his car around 6:30. However, they did not know where he was afterwards.
At this moment, a colleague provided a solution. From the lady's apartment and the company her husband worked for, there was a check-point in the midway and every vehicle had to stop and pay for it. So, it means that we can examine the surveillance there at first. If we found that car, we could follow the cameras along this way.
It was not difficult to get the video information, and we intensively examined the period around 6:40 to 7:00 because that car was highly possible to pass there that time. Fortunately, we found that car quickly. Seen from that video, that car had passed the checkpoint at first. However, this car drove a route to the outskirt of the city, rather than the way home.