That night, when Wang Feng finished eating the stir-fried rice cakes, it must have taken ten to twenty minutes.

In the delivery order placed by Wang Feng, apart from the stir-fried rice cakes, there was also a mango ice cream.

Wang Feng is allergic to mango, so this ice cream was definitely not ordered for himself.

If this ice cream was meant as a warning for someone coming later... the current scene doesn’t support that. The table is very clean, and in the trash bin, there is only a single piece of packaging paper, no cone, and no residue from melted ice cream.

That means the ice cream must have been eaten by someone else.

Lu Chuan bent down with tweezers, carefully extracted the ice cream wrapping paper from the trash bin, and cautiously placed it in an evidence collection bag.

Judging from the scene, the other party must have come into contact with the ice cream wrapping paper, and it’s very likely fingerprints were left on it. Lu Chuan needs to take it back for identification and analysis.

No matter what Wang Feng’s current situation is, finding the person who was with him that night might lead us to Wang Feng himself.

"Old Lu, come over here!"

While Lu Chuan collected evidence here, Yang Lin was also observing around.

Apart from the items on the coffee table and the ice cream wrapping paper in the trash bag, there were no other clues in the living room, so Lu Chuan turned over to the restaurant area where Yang Lin was.

"Old Lu, the glass on the table."

There was a transparent glass on the dining table.

Lu Chuan carefully gripped the thick base of the glass at the bottom, picked it up, and rotated it under the light to observe.

"There’s a lip print!"

"Did Wang Feng use it? Or did the other party?"

"That’s still uncertain for now, but I think it should be Wang Feng who poured the water for the other party. We’ll take it back for testing."

The glass not only had a lip print but also fingerprints.

The lip print on the glass would definitely leave secretions from saliva, which is one of the easiest samples to purify later on for DNA identification.

So, Yang Lin was quite excited just now because these things were emphasized during school lessons by the teacher.

But in the two years after graduating, Yang Lin has been working in a grassroots police station, and there hasn’t been much opportunity to practice and verify the forensic things he originally learned.

If another three or four years pass, Yang Lin might forget most of what he learned in forensic investigation.

Beyond the dining room is the kitchen.

Not many traces were left inside; he touched the inner wall of the range hood.

Yang Lin leaned in for a look, and his gloves were still white: "Wang Feng doesn’t cook, so the deliveries he usually orders leave no traces of the kitchen being used."

Lu Chuan nodded and left the kitchen.

Two bedrooms; the master bedroom facing south had the quilt neatly folded, and the room was clean and tidy.

The secondary bedroom had a simple bed and beer bottles on the floor.

It seemed uninhabited.

Lu Chuan opened the wardrobe in the secondary bedroom, and it was empty inside.

"Old Yang, it looks like we’ve got most places, what’s left is finding that phone."

Lu Chuan had quite a few discoveries at Wang Feng’s place.

The soil on the rug, fiber debris in the slippers, ice cream wrapping paper, and lip print fingerprints on the glass.

All these clues can basically identify the person who was with Wang Feng that night.

Latter at the Criminal Investigation Team, within a day or a day and half, it should be figured out.

Now, the important thing is that phone.

Lu Chuan and Yang Lin split up and searched every nook and cranny of the entire room.

But they found nothing.

"Old Lu, come on, let’s check the toilet tank, don’t they always show on TV that phones are placed in a waterproof cover and hidden in the toilet tank?"

Saying this, Yang Lin entered the bathroom and lifted the ceramic lid of the toilet tank...

It was empty.

"Get a chair over here."

Lu Chuan looked up at the integrated ceiling in the bathroom.

Wang Feng’s home is not too big, not too small.

Lu Chuan and Yang Lin searched for more than two hours all over the living room, kitchen, and bedrooms, but they could not find the phone Qin Yong mentioned.

Now, only the integrated ceiling in the bathroom and kitchen were left unchecked.

Yang Lin understood Lu Chuan’s intention and brought a dining chair from the dining room.

"You look here, I’ll check the kitchen ceiling."

"Alright."

The two split up to act.

Lu Chuan removed two ceiling panels, turned on his phone’s flashlight, reached in to illuminate, but found nothing.

"Old Lu! Come over!"

Just after he put the panel back, Yang Sen called Lu Chuan over.

"Damn, it’s here!"

Yang Lin stood on the chair, excitedly holding an old-fashioned non-smartphone.

"In the ceiling?"

"No, the phone wasn’t in the ceiling, I checked thoroughly up there, and there was nothing. But when I turned around and climbed down, I saw it on the shelf behind the water heater."

Turns out Wang Feng hid the phone in the empty space behind the water heater, which can’t be seen from below.

Even when Yang Lin stood on the chair and peered into the ceiling, he didn’t find it.

It was only when he turned around and glanced at the water heater that he found the phone.

Finding the phone brought a sigh of relief to both Yang Lin and Lu Chuan.

If the phone couldn’t be found, there were two possibilities: either Wang Feng hid it too well and they hadn’t found it, or he didn’t hide the phone at home but somewhere else.

Another possibility, which the two just speculated and least wished to encounter, was that Wang Feng’s identity had already been exposed, and the other party had found the phone.

Now that the phone is still here, it suggests that Wang Feng’s identity likely hasn’t been exposed.

Pressing the power button, the phone’s screen lit up.

This wasn’t a smartphone, but it did have a lock.

The screen wasn’t big, but it showed missed calls.

This type of phone has an advantage, with long standby time and good signal.

"Let’s go, see how Brother Hui’s investigation is progressing."

Zhang Hui had already canvassed the buildings upstairs and downstairs, inquired a bit, but didn’t obtain any valuable leads.

Now, Zhang Hui was checking the surveillance in the community security room.

"This is the surveillance footage from three nights ago."

The surveillance cameras in the community aren’t high resolution; besides a high-definition camera at the front main entrance, the others are just standard definition.

There’s no surveillance in front of the building Wang Feng lives in.

However, the community has an advantage — it’s a closed community with only front and rear exits, and no other entries or exits.

Zhang Hui abandoned checking surveillance within the community courtyard.

Since it’s a closed community, if Wang Feng wanted to leave, it’s either through the front or back doors, with no other options. He surely wouldn’t climb over the wall.

Zhang Hui reviewed the footage from half-past eleven that night at both the front and back doors and quickly found a clue.