The group regrouped again, this time Aubrey went to the CSI lab to keep an eye on the DNA test results, and with his communicative skills, he should soon be able to get acquainted with Mike Taylor's people, and Jiejie and Hannah were in charge of investigating new suspects.

Soon Hannah had the results, "According to the North Westchester County Housing Authority, Sigby applied to rewire his café five months ago, and I contacted the contractor, and a total of about 1 ton or so of No. 14 wire was used in the works. ”

"It looks like the timing is right." Jack said no problem, "Take him back and ask." ”

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

Hannah and Jiejie were in charge of the 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 a seat, then got straight to the point, "Mr. Sigby, why is your café being rewired?" ”

"Why?" Kenneth Sigby was a little confused by the question, and he thought of countless possibilities along the way, but he didn't expect to be asked such a question after being invited into the interrogation room.

"Because. Because my shop was closed for a while, I wanted to attract customers back. He explained with a slight stammer.

"People usually sit in a café just for a good Wi-Fi and to charge their phones, and they don't care if the coffee is really good."

"Makes sense." Jie Jiejie was almost amused by his overly nervous expression, and glanced at Hannah, and then at the one-way glass behind her.

The two men behind the glass were a little disappointed, Jubal was experienced, Jack was well-versed in psychology, and the first reaction of this one was that 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 will be so good that they can even fool some old cops, and some will choose to remain silent and confrontational.

Ordinary people's reactions are also different, not everyone who panics has a ghost in their hearts, and not everyone who asks to see a lawyer in the first place must have a problem.

For example, Kenneth Sigby's stunned expression but the ability to give a reasonable explanation at the first time usually means that although he is flustered, he is not weak-hearted.

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

Of course, this also has to be considered in combination with other factors, and there is only one IP address that can be linked to the serial murder case at the moment, considering that he owns a café, and Hannah and Jiejie invited him to the Federal Building in the name of assisting in the investigation.

But since he has come and come, he looks like he has to answer all questions, so he must be as clear as possible about the situation.

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 Sigby continued to be confused, "Of course, I paid for those materials, and those materials are not cheap, and they can always be used for future repairs." ”

In the ensuing questioning, Kenneth Sigby said that he didn't know anything about a website or what "Incel" meant.

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

Unexpectedly, the IT department sent a team of technicians to inspect Kenneth Sigby's café and all the electronic gadgets that could be used to access the Internet in the home, and found no clues.

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

Hannah looked frustrated, "yes, that's what we thought too, so we had the technician check the router, and they did lock a laptop, and every time someone logged into a website from that IP address, that computer happened to be connected to the store's Wi-Fi."

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

Each computer has its own unique "electronic fingerprint", the most common one is the MAC code bound to the network card, theoretically when the technician obtains the MAC code of the computer, the computer will be the first time to log in to other places to get the location.

It's very simple to crack it, just change the network card to the computer, and that's probably what the murderer did.

"When was the last time that computer was online?" Jack Mo rubbed his chin in deep thought.

"The day after we found the three bodies in Central Park, it was supposed that the killer saw the news report." Jiejie quickly caught up with Jack's train of thought.

"So our murderers are as cautious as ever." Jack thought about it, and he could only use one last resort, check the monitoring.

"There is no surveillance in the coffee shop, but it doesn't mean that there is no around the coffee shop, so let the technician look around and see if there is a surveillance camera facing the door of the coffee shop."

Hannah's eyes lit up, "I remember there was an ATM machine across the street from the coffee shop, so I'm going to do it." ”

The two girls pulled themselves together again, and Jack patted Jubal on the shoulder as a sign of comfort, the guy who had been wilting since his ex-partner came to visit him today.

Just as he was about to say something, Aubrey broke into the office in a rage, his little eyes bigger than the brass bell, "You would never have thought of it"

He picked up a glass of water on the table, no matter who it was, and drank it dry in one gulp, before continuing, "The forensic doctor really couldn't find any residual DNA in the corpse, only the lube of the sleeve.

But CSI has matched a person with DNA on plastic sheeting scraps found at crime scenes, and you never know who he is."

"Who is it? Don't expect to eat and drink with me after selling it again. "Jack doesn't have a good air.

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

"It's absolutely impossible!" Jubal blurted out.

——

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

Last night, there were countless possibilities as to why Kerry McMay, who had been in prison for three years, had his DNA appear at the latest crime scene.

It has not been unheard of in the past when inmates in prison have tried to smuggle their bodily fluids out of prison and then falsified the scene of a rape and murder in an attempt to confuse the public, but the uniqueness of DNA evidence has never been overturned.

Kerry McMue has only one living sister, and while rapid testing technology can be confusing due to genetic similarity between relatives, it must at least be of the same sex.

Moreover, CSI was able to extract enough DNA from the epithelial cell tissue found at the scene to detect enough DNA to be detected, and as long as the body was found a day later, that residual trace may disappear.

Trying to falsify evidence in this way is hardly feasible and pointless.

Excluding all impossibilities, there seems to be only one possibility left, and Kerry McMay, who has been in the state prison for three years, is not himself.

(End of chapter)