In the Criminal Investigation Team, a homicide case is an order.

When there's a homicide, everything must give way to it.

Overtime has no limit, vacations are all canceled, it's always like this.

Last time during Zhang Wen's case, there were two frontline detectives on vacation. They had just gotten off the plane and hadn't left the airport before buying tickets to fly back.

As for the reimbursement of the airfare...

Don't even think about it, vacations aren't business trips, how could they be reimbursed?

The Criminal Investigation Team is very poor; Lu Chuan heard this when he first started working. He heard it more than once.

Moreover, looking at those old, decrepit cars is proof enough.

The equipment is outdated, and the team building hasn't been renovated in over twenty years.

The decor gives Lu Chuan a feeling of returning to his childhood.

The floors inside the building creak when you step on them.

This is also why the four people in the Crime Scene Investigation office use enameled mugs in such harmony.

The environment is just like that era.

Except for a few laboratories built in recent years with modern styles, the rest is old enough to shoot nostalgic films.

However, sometimes the Criminal Investigation Team indeed has money.

For example, now that a homicide has occurred, cost is no concern.

Human resources, material and financial resources, no need to apply, use them directly, give whatever is needed.

As long as the case can be solved.

Standing outside the building, the entire Criminal Investigation Team building is still brightly lit.

Many people are coming and going, back and forth.

At past three in the morning, it's not at all as quiet as usual.

"Master, it's done."

Yawning, Lu Chuan handed four reports to Liu Guodong.

This is the advantage of having skilled people on your side.

When they say they'll do an appraisal, it can be done overnight without eating, drinking, or sleeping.

In the past, these things had to be helped by the traffic police team.

"Two sedans, one SUV... and a van?"

This is the vehicle information of the four sets of tire marks in the four reports.

Old Bai and Yang Sen also came over and began to flip through the reports.

The two of them couldn't be much help; they just took a nap on the sofa.

Now they're in good spirits.

Actually, for Old Bai and Yang Sen, working overtime without being able to take a vacation home is pretty good.

There's no need to mention Old Bai; at his age, various parts work sporadically, he can't do much at home either.

Over the past year, Yang Sen has been quite tormented by his wife and son.

A wife in menopause, a son about to take the college entrance exam, Yang Sen feels there's nothing scarier than these two.

Now to be able to stay in the office because of a homicide, smoking Chunghwa cigarettes, it's quite relaxing.

No one wants a homicide to occur, especially a case like Song Kun's sacrifice.

But from the perspective of going home or not, Old Yang clearly has his own views.

Lu Chuan lit a cigarette for himself, and tonight, he has already gone through a pack.

No wonder most detectives are heavy smokers.

It's most likely because of all-night vigils.

"Two SUVs," Lu Chuan paused: "Actually, to be precise, they should be SUV models, one with a wheelbase of 2550, one of 2560, both are compact SUVs."

"Tire width is 205, aspect ratio 60, SUVs using this kind of tire are mostly cheaper."

"I'm not very knowledgeable about car prices, I can only make a general guess."

"And these two cars are both two-wheel drive."

"As for the van, the tires are severely worn, the treads are very shallow, the tire pressure on all four wheels is uneven, and one tire's tread is even different from the others."

"This should be a cargo van, probably quite old."

Lu Chuan pointed to the last report: "This report..."

"I suggest we focus on investigating it."

"Oh, why?"

Liu Guodong took out the last report on the sedan tire identification and examined it carefully.

"Because the tire marks of this car are somewhat peculiar."

"This set of tire marks, the front and rear tire widths are different, which is rare in domestic cars."

The report notes that this set of tires has a front tire width of 245, aspect ratio 45, while the rear tire width is 275, with an aspect ratio of 40.

Tire production and use have strict standards.

What kind of vehicle uses what specifications of tires is set at the time of manufacture.

Generally, it cannot be changed arbitrarily; after changing, the vehicle's handling, safety, and comfort will be affected.

Moreover, changing tire specification sizes involves modification, which needs to be agreed upon and filed before it can be used on the road.

Lu Chuan continued: "The tire's aspect ratio refers to the percentage of the tire's sectional height to its maximum sectional width; simply put, it's the tire's height-width ratio."

"Tires with a high aspect ratio have longer sidewalls for stronger cushioning ability, relatively higher comfort, but less road feel and weaker lateral resistance when turning."

"Low aspect ratio, large inner diameter tires, because of the short sidewalls and wide tread, have a large ground contact area, can withstand more pressure, respond very sensitively to the road, and have strong lateral resistance when turning, enhancing the vehicle's handling."

"This car not only has a small aspect ratio, wide tires, but also narrow front, wide rear tires, typically only found in vehicles pursuing ultimate driving handling, and most of them are imported cars."

"As far as I know, among the common brands, only BMW and Jaguar have this type of tire design in their mass-produced vehicles."

"Based on the tire tread drive, it's also possible to determine that this car is a rear-drive model, which further enhances vehicle handling."

"Under normal circumstances, the probability of such a car appearing near the mountain ditch around Xinjian Village... unlikely."

After hearing this, Liu Guodong's eyes lit up.

Exactly.

A car pursuing ultimate handling in the mountain ditch near Xinjian Village?

"Lu, you're good, and you said you're not familiar with car models; seems like you do know a bit."

Old Bai smacked his lips and showed a bit of joy on his face.

Ever since Lu Chuan joined the Crime Scene Investigation, the office's role in solving cases has become increasingly prominent.

Originally, the Crime Scene Investigation had many resources, and now with its sizable role, its reputation is quite good.

Everywhere, the amount of resources you control and the degree of effectiveness are never in a positive correlation.

Lu Chuan bared his teeth; he truly hasn't researched much about vehicles.

The reason he knows more about this special model is that he himself has such a car.

Because of the different tire sizes, the vehicle is lower in the front and higher in the rear, giving it a very imposing look, with the visual effect maxed out.

It's just a bit pricey.

The analysis report of the four sets of tires was quickly sent to Qin Yong's hands.

Qin Yong, who had stayed up most of the night, had bloodshot eyes.

But the case progress still had its effects.

Especially with Lu Chuan's footprint analysis, narrowing down the suspect range, it provided very useful references for the detectives on the front line.

Though there's still no substantial progress, it's better than groping in the dark; having a target range and not having one isn't just about investigation difficulty.

It's also a good morale boost for the frontline detectives.

Just like a teahouse or club, only by constantly offering new tea can tea enthusiasts keep coming to experience fresh tastes.

If you keep serving the same black, green, oolong teas, business will definitely decline.

People are like this; curiosity is the original sin of all desires.

Tea tasting, solving cases, it's the same reasoning.

Looking for an unknown person among the vast sea of people, versus looking for a confirmed male and female within a specific height and weight range, the expected difficulty in mind is different.

Seeing the tire mark identification report made Qin Yong's eyes gleam green.

Just as Lu Chuan speculated, how could such a car be in the mountain ditch?

Too secluded even for a wild excursion no one would watch.

"Someone, come!"

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