In a murder case, the simplest way is to find an opportunity to stab the person to death. However, for a more intelligent case, such as poisoning, there are several steps.
For example, prepare a colorless and odorless poison, put it into the water that the deceased drinks, and then let the deceased drink it when he is not prepared.
A well-known case, for example, the heavy metal thallium poisoning case, remains unresolved because there is not enough evidence and although some people are highly suspected.
Any slightly complicated murder case requires several steps of calculation, and the most talented people will try to design unexpected events.
Take this case for example - if it was really a murder.
There was an accident in this case. The deceased suffered a sudden heart attack and died directly from the fire.
According to Sun Jie, this was not a bomb after all, it was just a momentary explosion, and people would not die. At least there was a possibility of rescue.
"If this is murder, the victim must be killed," Bai Song said to everyone. "Based on this, the murderer may have a backup plan, such as delaying the victim on the way to the hospital. Or, he may try to get the victim drunk that night."
"This is an idea." Captain Zhuang nodded.
Captain Liu of the Xijing Branch frowned and said, "Are we overthinking this?"
Captain Liu looked at Bai Song and said, "Inspector Bai, don't think everyone is as smart as you."
"I wonder what you mean, Captain Liu?" Bai Song asked.
"Don't get me wrong." Captain Liu said, "Not everyone is as professional as you. I think if this is a homicide, then the murderer might think that this will definitely kill Yao."
"What you said makes sense." Bai Song nodded: "Can you tell me more about it?"
"If it was an outsider who murdered or the suspect's children, the murder might have been designed in a more sophisticated way. But these water cats, it's not that I look down on them. We have encountered water cats who killed their bosses over the years, and most of them were stabbed to death directly." said Captain Liu.
"Hmm." Bai Song seemed to be thinking about something.
Bai Song understood what Captain Liu meant. There was no need for workers to kill their bosses. They would not get paid if they did, and they might even have to pay with their lives. Most cases where workers killed their bosses were to force them to pay their wages, and ended up getting so angry that their hair flew up into their hair and blood splattered everywhere, causing a tragedy. Very few of them planned their actions and simply wanted to kill someone.
"After saying so much, if it was a murder, what was the motive?" Captain Zhuang interrupted everyone.
This is actually the key to solving the case. Everyone knows that a murder case is not a simple case.
"We have to expand the search area. Yao is a loner. He took the initiative to invite everyone to dinner this evening. He invited everyone to dinner for the start of a new project." Team Leader Liu asked, "To what extent did this guy have to offend people for something like this to happen?"
What Captain Liu said is also a field of criminal psychology.
Many veteran detectives don’t know what a certain theory is called, but they still have enough understanding of it in practice.
In the court's judgment, if other circumstances of the case are the same, premeditated murder will be sentenced more severely than homicide.
The reason for this difference is that the subjective malice of premeditated murder is more serious than that of savage murder. For example, a worker goes to his boss to ask for wages and kills someone because he is desperate. He is doing it for money. If the boss gives him money, it will be fine. His subjective malice is slightly weaker. However, premeditated murder does not consider other circumstances at all, "I just want to kill you", so his subjective malice is stronger.
Therefore, a premeditated murder with a certain plan is most likely caused by a deep hatred.
"From this perspective, I am more inclined to shift the focus of the investigation on Yao's ex-wife, children, and closest friends, because deep hatred does not form in a day or two." Bai Song said: "Although it was the daughter who called the police and the son who asked us to open a case for investigation, we cannot rule out the suspicion of the two."
"I support what Inspector Bai said." Captain Liu nodded: "We need to step up our efforts to investigate Yao's life."
"I want to find his children and ask about the situation again." Bai Song said.
"Okay," Team Leader Liu looked at his watch and said, "It's already late at night. His children are all gone. They will definitely come again tomorrow. There's no need to call them, so they don't have to be mentally defensive on the way here."
"It's up to you."
…
People from the headquarters and local detachments continued to conduct joint investigations.
As the investigation into the case progressed, Bai Song still tried to review his previous thoughts.
That is: If the murderer felt that Yao might not die, what other plans did he have?
After careful investigation, we actually discovered the situation.
One of the deceased’s bank cards was frozen last night!
"What could be going on?" Liu Shuyuan yawned. "It took a lot of effort to ask the bank for help in the middle of the night."
"How did it freeze?" Bai Song asked.
"It was caused by entering the wrong password multiple times in online banking," Liu Shuyuan explained.
“Could it be that someone hopes that Yao will have no money to stay in the hospital?” Wang Liang’s eyes lit up: “This is the backup plan that Bai Song mentioned!”
"Impossible." Bai Song shook his head. "I know that Yao himself has been injured and there is no way to unfreeze it, but the hospital cannot just stand by and watch someone die in this situation. Many people think that hospitals are just asking for money. Hospitals are not charity organizations, but when faced with acute trauma such as traffic accidents, hospitals cannot just stand by and watch someone die because they don't have money."
"Bai Song," Sun Jie thought for a moment, "I think what Captain Liu said just now is right. Don't put your thoughts into the murderer's mind. Maybe the murderer really thinks that this will make the hospital not save the patient."
After saying that, Sun Jie glanced at Wang Liang, and then said to Bai Song: "For example, Wang Liang doesn't know about this kind of thing."
"Who said that..." Wang Liang stiffened his neck and said stubbornly, "I'm just throwing out some ideas to stimulate discussion!"
…
"Then we need to check whether Yao's other cards have been frozen in the same way." Bai Song said: "The person who knows his card number must be familiar with him, either his children or someone who has a transfer record with him."
"This is the only bank I'm familiar with. You know their systems are closed at night, so it's not possible to find a bank staff member on duty to do it." Liu Shuyuan said, "Let's wait until tomorrow."
"Many things have to wait until tomorrow..." Bai Song was inexplicably impatient, "Speed is of the essence in war."
"Then you tell us what to do, we'll listen to you," said Sun Jie.
"I still have to start from the beginning. I need to know how this person died and how the explosion happened." Bai Song put the problem on the table: "First, we have to understand what the explosive is. We have to solve the case before dawn."
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