"These two people are from the criminal investigation team of the Municipal Public Security Bureau,'1. 12 'They are responsible for the murders. Someone in the audience whispered.

"It's not easy to solve the case in such a period of time!"

"This Captain Ouyang Ping has solved a big case."

"This is Ouyang Ping, Captain Ouyang of the Criminal Investigation Team of the Jingnan City Public Security Bureau, Captain Ouyang, stand up, this is Deputy Captain Liu Dayu Liu." Zhang Zaiqiu looked at Ouyang Ping and Liu Dayu and said.

Ouyang Ping and Liu Dayu stood up and bowed to the audience, nodded their heads, and then sat down.

"Anyone who pays attention to this murder case knows that it took Captain Ouyang and his comrades ten days to solve this case, why is this? Because the murderer has eliminated almost all traces of the crime, the murderer has carried out careful planning before committing the crime, and after the murder, he has eliminated all the traces of the crime at the scene, is this like the work of a person with an unsound mind, disordered thinking, and abnormal behavior? I don't think anyone with a little common sense, normal thinking, and healthy mind will come to a correct judgment. This lawyer may say this more abstractly, okay, then I will talk about some details. ”

The audience was silent, and everyone was full of expectations for Zhang Zaiqiu's "details".

When the murderer Li Dongting inadvertently learned from the victim Mr. Liu that the old couple were going to withdraw 260,000 yuan from the bank, he began his murder plan, and on the afternoon of January 11, when Mr. Liu's lover Mr. Ma went to the Industrial and Commercial Bank of Qili Street to withdraw money, Li Dongting followed, and the purpose of following Mr. Ma was to confirm Mr. Liu's statement. Li Dongting, who has never liked to wear hats, wore a peaked cap, and the purpose of wearing a hat was not only to be afraid that Teacher Ma would recognize him, but also that the staff in the bank would recognize him -- because there were his students among the staff of this bank. That's the first point. Second, on the afternoon of January 12, it was raining all the time, which provided very favorable conditions for Li Dongting to commit the crime; Next to the scene of the crime is a large vegetable field, and the rain drops hit the roof of the large vegetable field, and the sound was very loud, so as to cover the sound of the victim crying for help and struggling. Third, at three o'clock in the afternoon of January 12th, Li Dongting called Mr. Liu, saying that he could find time to help Mr. Liu's family install and debug the computer in the afternoon, and that the installation and debugging of the computer must have a network card, and he asked Mr. Liu to send his wife to the five-star electrical appliance hypermarket on Shanxi Road to buy a network card, and Mr. Ma to the five-star electrical appliance hypermarket on Shanxi Road It takes at least more than two hours to go back and forth, so that Li Dongting has plenty of time to commit crimes. Fourth, in a little more than half an hour, the murderer Li Dongting successively killed Mr. Liu and her two granddaughters Chen Qiming and Chen Qidi, how did the murderer do it? Because he mastered the time when Chen Qiming and Chen Qidi sisters got out of school. The head teacher of his younger sister Chen Qidi has the habit of leaving his comrades behind to sum up the day's work after school -- usually, the two sisters rarely go home together after school, Li Dongting, as Chen Qidi's mathematics teacher, knows these situations well, and the time when the sisters return home is about ten minutes apart, and the murderer Li Dongting took advantage of this ten minutes or so to kill two fresh lives one after another. ”