Yan Jianhua was in charge of driving the car, and Liu Dayu and Han Lingling got off the boat with Gao Jianguo and Luo Zirong.

Under Luo Zirong's introduction, the three of them shook hands with Xiao Zhang one by one.

"Xiao Zhang, when did Yin Daping go to jail?" Luo Zirong is more anxious than Liu Dayu.

"1987."

1987. He was imprisoned for three years, and his release from prison should have been in 1990. The first time he lived at No. 157 was from September to November 1989. The time is not right.

Doesn't the age of people who have just come out of prison look a little old? The age should be able to match the upper number.

Could Yin Daping be surnamed Ma? Liu Dayu, who was as careful as a hair, wanted to find out the specific time when Yin Daping was released from prison: "Xiao Zhang, do you know the specific time when Yin Daping was released from prison?" ”

Xiao Zhang took out a notebook from a black leather bag and flipped to one of the pages, on which the specific dates of imprisonment and release were written: time of imprisonment, January 1987; Released from prison, August 1989.

In this way, the time is finally right.

Xiao Zhang is also a very careful person: "The time of release from prison was originally January 1990, because Yin Daping performed better, and his sentence was reduced by four months. ”

Yin Daping was released from prison in August 1989, while the person surnamed Ma was admitted to No. 157 in September. The timing is too high!

After that, everyone drove to the household registration department of the Chongming County Public Security Bureau, and when Liu Dayu and they first came to Shanghai, Chongming County was not within the scope of the household registration search.

On this trip to Chongming Island, Liu Dayu brought two simulated portraits, as well as the household registration information of more than a dozen people he searched for when he came to Shanghai for the first time.

The three of them walked into the household registration department with a nervous mood, this trip to Chongming Island, if you can't find out the clue, the following investigation will be even more difficult.

Two female comrades in the household registration department were already ready, and the computer was turned on. Yin Feipeng and Yin Daping's household registration information has appeared on the screen.

When the three of them saw the photo on Yin Daping's ID card, they were stunned, and said that it was more accurate to say that they were very excited, Yin Daping's photo turned out to be very similar to the simulated portrait, whether it was the face shape or facial features, it was the same, the only difference was the hair, Yin Daping on the ID card was long hair, this should be the photo Yin Daping took before he was imprisoned, Yin Daping must have short hair when he was released from prison, and when he was released from prison in August, it should be ultra-short hair, long to September, the hair just grows, but it is still short hair, at most the shadow of the prisoner is hidden, everyone remembers! The surname Ma is short-haired.

In the household registration information of Yin Feipeng's father and son, there is no figure of the mysterious woman. On this trip to Chongming Island, it is also a great gain to be able to find the whereabouts of the surname Ma.

Liu Dayu thought of Guo Changping's words: The murderer should be an orthopedic surgeon, at least a dentist. Yin Daping is a prisoner, and it is unlikely that he has anything to do with the doctor.

"Xiao Zhang, in addition to the information displayed on the household registration, how did you get the other information?"

"Early this morning, I went to the vicinity of Yin Feipeng's house to investigate and visit a few neighbors."

"Based on our analysis, the killer in this case may be an orthopedic surgeon -- or a dentist." Liu Dayu went straight to the point.