The world of American TV series: Starting with the L.A. Patrol.

Everyone regrouped again. This time Aubrey went to the CSI laboratory to monitor the DNA test results. With his communication skills, he should be able to get acquainted with Mike Taylor's people quickly. Jiejie and Hannah were paired together. Responsible for investigating new suspects.

Soon Hannah had the results, "According to the Northern Westchester County Housing Authority, Sigby applied to rewire his cafe 5 months ago. I contacted the contractor and the total cost of the project was approx. About 1 ton of 14 gauge wire.”

"It seems like the time is right." Jack said there was no problem, "Let's bring him back and ask."

Two hours later, a young man with a somewhat panicked expression was invited into the interrogation room.

Hannah and Jiejie were in charge of questioning, while Jack and Jubal were still standing in the observation room separated from the interrogation room by a one-way glass.

Hannah motioned for the other party to sit down, and then went straight to the point, "Mr. Sigbee, why do you need to rewire your cafe?"

"Why?" Kenneth Sigbee was a little confused when he was asked. He thought about countless possibilities along the way, but he never expected that he would be asked such a question after being invited into the interrogation room.

"Because...because my store was closed for a while and I wanted to attract customers back." He explained with a slight stutter.

"People usually sit in coffee shops just to have good Wi-Fi and to charge their phones. They don't care if the coffee is really good."

"That makes sense." Jiejie was almost amused by his overly nervous expression. She glanced at each other and then looked at the one-way glass behind her.

The two people behind the glass were both a little disappointed. Jubal was experienced and Jack was proficient in psychology. From his first reaction, he knew they had found the wrong person.

Each criminal brought into the interrogation room behaves differently. Some will be angry and try to prove their innocence, some will pretend to be innocent, and their acting skills are so good that they can even deceive some veteran police officers. Choose silence and confrontation.

The reactions of ordinary people are also different. Not everyone who panics has something wrong with him, and not everyone who is awesome and asks to see a lawyer immediately must have a problem.

For example, when Kenneth Sigbee looked stunned but could give a reasonable explanation immediately, it usually means that although he was panicked inside, he was not guilty.

The panic in his heart may simply be because he, as a law-abiding citizen, was suddenly invited to the famous FBI. Even if he was facing two beautiful female agents, he would inevitably feel a little uneasy.

Of course, this must be considered in conjunction with other factors. Currently, there is only one IP address that can connect him to the serial murder case. Considering that he runs a cafe, Hannah and Jiejie invited him in the name of assisting in the investigation. to the Federal Building.

But now that he's here, and he seems to answer all questions, he must be trying to understand the situation as much as possible.

Hannah continued, "We talked to your contractor and they said you asked for all the remaining wires to be left behind after the renovation was completed. Why is that?"

Kenneth Sigbee continued to be confused, "Of course, I paid for those. The materials are not cheap. They can always be used for repairs or something in the future."

During subsequent questioning, Kenneth Sigbee stated that he knew nothing about a particular website and did not know what “Incel” actually meant.

Under the pressure of Hannah and Jiejie, he was even willing to hand over his computer to the FBI for inspection without a search warrant.

As expected, the IT department sent a team of technicians to check all the electronic products that could be used to access the Internet in Kenneth Sigbee's cafe and home, but found no clues.

Compared to the discouragement of others, Jack comforted everyone with a smile on his face, "So, the good news is that the suspect may be a customer of the cafe, right?"

Hannah looked frustrated, "Yes, we thought so too, so we asked the technicians to check the router, and they did lock a laptop. Every time someone logged in to the website through that IP address, that computer happened to be connected to the store. Wi-Fi inside.

But the problem is that we can't find the computer now. "

Each computer has its own unique "electronic fingerprint". The most common one is the MAC code bound to the network card. In theory, after the technician obtains the MAC code of that computer, the computer will be the first to log in elsewhere. The time is obtained from the position.

It's very simple to crack it. Just replace the network card in your computer. This is probably what the murderer did.

"When was the last time that computer was connected to the Internet?" Jack rubbed his chin in thought.

"The day after we found three bodies in Central Park, the murderer should have seen the news reports." Jiejie quickly followed Jack's thoughts.

"So our murderer is as cautious as ever." Jack thought about it and had no choice but to use the last resort, check the surveillance.

"There is no surveillance inside the coffee shop, but that doesn't mean there isn't one around the coffee shop. Let the technicians look nearby to see if there is a surveillance camera facing the door of the coffee shop."

Hannah's eyes lit up, "I remember there is an ATM machine opposite the coffee shop, so I'll go and do it."

The two girls cheered up again and left together. Jack patted Jubal on the shoulder to express comfort. Ever since his former partner came to visit today, this guy has been wilting.

Just when he was about to say something, Aubrey burst into the office in a hurry, his little eyes were as big as a bell, "You will never expect this."

He picked up a glass of water on the table, no matter whose it belonged to, drank it in one gulp, and then continued, "The forensics did not find any residual DNA in the body, only the lubricant of the condom.

But CSI found a person through DNA matching on scraps of plastic sheeting found at the crime scene, and you would never guess who he was."

"Who is it? If you keep showing off, don't expect to eat and drink at my place anymore." Jack said angrily.

Aubrey turned his head sharply and looked at Jubal, "The Kerry McMay you asked me to check before is the Kerry McMay who should still be in prison!"

"This is absolutely impossible!" Jubal blurted out.

-

Early the next morning, Jack and Jubal rushed to the state prison.

Last night everyone discussed numerous possibilities as to why Kerry McMay, who had been in prison for three years, had his DNA appear at the scene of the latest crime.

There have been cases in the past where prisoners in prisons tried to smuggle their own bodily fluids out of the prison and then faked rape and murder scenes in an attempt to confuse the public. However, the uniqueness of DNA evidence has never been overturned.

Kerry McMay only has one biological sister alive. Although rapid testing technology may indeed cause confusion due to genetic similarities between direct relatives, they must at least be of the same gender.

Moreover, CSI was able to extract enough DNA for detection from the little bit of epithelial cell tissue left on the plastic bag fragments found at the scene. It was a bit of a fluke. As long as the body was found one day late, the remaining traces might disappear. .

It is almost impossible and meaningless to fabricate evidence in this way.

So after eliminating all the impossibilities, it seems that there is only one possibility left. The Kerry McMay who has been imprisoned in the state prison for the past three years is not himself.