Luke didn't immediately interrogate Boris.
If he wasn't the murderer, the interrogation would be meaningless.
If he was, he wouldn't easily confess without enough evidence.
The key now was to find evidence that he had been at the crime scene during the time the crime occurred.
Luke found Matthew and asked him to investigate the cars registered under Boris's name.
Driving from Las Vegas to Los Angeles was a fast and inconspicuous mode of transport.
According to Ikaline's statement, she had texted Boris at 4 PM on April 30.
If Boris had immediately returned to Los Angeles, he would have arrived no earlier than 7 PM.
Courtney's time of death was between 10 PM and 2 AM.
Therefore, it was very likely that Boris drove to Courtney's home sometime between 7 PM and 2 AM.
Considering that the dentist, Peter, was at Courtney's home from 9 PM to midnight,
Boris likely arrived after he had left.
Investigation should focus on the time period between midnight and 1:30 AM.
Starting from the focused time frame would yield better investigation efficiency.
Boris owned two cars, a white Ferrari and a black Mercedes-Benz S-Class, both of which were key targets in the investigation.
Afterward, they started checking the surveillance cameras around John's neighborhood.
Luke had previously disliked checking surveillance—not because he was being pretentious, but because this task was not as easy as imagined.
Sometimes it took an entire day, causing dizzy spells and a sore backside.
However, today was somewhat different.
Having used the Observation Card last night, Luke felt his Observation skills had significantly improved, and today was a good day to test it.
In the afternoon, the entire Robbery and Murder Department's first squad was checking the surveillance footage.
As for Boris, the deputy team leader handled it, as the old man was very experienced in such matters.
Boris was taken to another resting room.
Initially worried that the police would immediately start interrogating him, he only relaxed when his lawyer arrived.
However, the police continued not to question him.
Waiting, waiting, both he and his lawyer grew impatient.
The lawyer 'smelled' something different, and started to urge the police to question them.
Then it was time for the deputy team leader to enter the scene.
He would speak a few formalities, such as an emergency that had cropped up, saying the police would promptly arrange for questioning, so they need not worry.
Once here, it wasn't so easy to leave.
The lawyer pushed and protested, and the old man politely brushed him off.
In short, they were stalling.
The police focused on Boris's Ferrari and Mercedes-Benz for the investigation.
Having checked most of the community's surrounding surveillance, they hadn't seen either car during the key time frame.
The other team members began to extend the investigation from 7 PM to 2 AM.
Luke was getting tired from watching surveillance footage, so he stretched and poured himself a cup of coffee.
Standing by the window looking at the street outside, he organized his thoughts.
He realized that there might be an issue with the direction of the investigation.
Check the cars registered under Boris's name during the focused time frame already took over an hour.
If he were to extend it to 7 PM to 2 AM, it would take even longer.
If, after all the checking, they still couldn't find Boris's cars, what then?
The police couldn't detain Boris indefinitely.
They couldn't ignore him forever, either.
Luke began to think from Boris's perspective. If he just wanted to talk things out with Courtney, he would drive the Ferrari back to Los Angeles.
If he already harbored thoughts of murder, he wouldn't use his own cars.
Exactly, there was the issue.
Since everyone was investigating Boris's cars, Luke decided to switch approaches.
He revisited the surveillance around the community during the focused time frame.
The difference now, he wasn't looking for cars registered to Boris, but for vehicles with Nevada license plates.
Each state in America has different license plates.
California license plates: the first and fifth to seventh positions are numbers, and the second to fourth are letters, for example, 8Ceb383.
The Nevada license plate has a mountain pattern in the background. To distinguish from other states, the mountain pattern uses a geometric mosaic style, which is quite characteristic.
The separator between numbers and letters is styled after Nevada's outline, for example, 273·A49.
With the training from the Observation Card, Luke's observation skills had greatly improved, and he could check surveillance faster than the average person.
About twenty minutes later, Luke spotted three vehicles with Nevada plates, license number 653·A28, during the critical timeframe.
Among them, a Porsche 718 became a prime suspect in Luke's investigation.
The driver wore a hat, obscuring the face, but Luke recognized the hat—it was the same one Boris was wearing today.
"Guys, I've found Boris!"
Boris sat by the table, head bowed, his expression unclear.
The deputy team leader stood with arms crossed by the glass, looking outside.
A middle-aged Caucasian man in a suit protested by hitting the table, "Hey, Deputy Vincent.
I've waited for two hours, had two cups of coffee, three cups of tea, and my client has waited even longer.
If before I doubted the efficiency of the police, now I'm starting to doubt their sincerity.
Moreover, I doubt that the police even have sufficient evidence to detain someone."
The deputy team leader still spoke in the same tone, "Don't rush, they are indeed verifying the details. If without questioning they can prove Mr. Boris's innocence...