Chapter 622 A Bunch of Keys

Qin Yu's performance was completely beyond Chen Yan's expectations. During the entire interrogation process, Qin Yu responded very quickly and logically to Liu Qingshan's various questions.

Suffice to say, there are no loopholes so far.

He was the only person Chen Yan saw during so many interrogations.

What does this mean? First, Qin Yu is not a murderer at all. He did not kill anyone at all. What Qin Yu said are all facts, so there is no problem with logic. He is magnanimous and fearless in his heart, and there is no problem with his expression.

The second is that Qin Yu really killed someone, but Qin Yu's self-control ability, especially his ability to control his own thoughts, expressions, and emotions is very powerful, far beyond ordinary people.

What confused Chen Yan was that both of these possibilities were present in Qin Yu, but neither was certain.

Qin Yu is said to be the murderer because he has the motive and conditions to commit the crime.

Qin Yu lived in Room 202 in Building 1 on the night of the incident. Chen Yan personally inspected this room and was able to avoid the surveillance cameras and reach the scene.

And judging from the entire logical process of Qin Yu's planning of the murder, there is no big problem.

However, all this is based on reasoning, and Qin Yu did not leave any evidence behind when he killed someone.

Just like Qin Yu just answered Liu Qingshan's question, it was a complete coincidence that he decorated Hengchang Community. He lowered the decoration price for Room 202 in Building 1 to let the owner help introduce business, and the purpose has been achieved. Room 803 in Building 3 The decoration was introduced to Qin Yu by this owner.

Although everything is full of coincidences, every coincidence can be explained clearly, which is amazing.

That's why Chen Yan felt that Qin Yu's plans and arrangements were indeed somewhat seamless.

But the Skynet is vast and sparse.

Any crime will leave traces as long as it is committed. The difference is that the traces may be large or small and difficult to detect.

Coincidentally, Chen Yan is best at discovering subtle traces.

Just before interrogating Qin Yu, Chen Yan noticed a detail at the decoration site of Room 803, Building 3, which was a bunch of keys.

"Qin Yu, do you recognize this bunch of keys?"

Um?

Faced with Chen Yan, this young and somewhat excessive police officer, Qin Yu did not pay attention to him at first and only regarded Chen Yan as Liu Qingshan's follower.

It's no wonder that Qin Yu ignored Chen Yan. During the two consecutive interrogations, Chen Yan only raised a question at the beginning of the interrogation and then said nothing again.

However, it was at this moment that Qin Yu realized something was wrong.

As soon as Chen Yan spoke, Liu Qingshan immediately stopped asking himself questions. Does this mean that this young and excessive detective is at least on the same level as the person next to him?

However, these were not what Qin Yu paid attention to. What surprised him was the bunch of keys that Chen Yan threw on the table.

The keys are very ordinary. There are five keys in a bunch, worn in an ordinary stainless steel key ring, and some are dirty and placed in a transparent plastic bag.

When Chen Yan took out the key, he stared closely at the change in Qin Yu's expression. Sure enough, Chen Yan was not disappointed this time.

Although Qin Yu was trying his best to control his expression, his uncontrollable and rapidly shrinking pupils still betrayed Qin Yu's inner peace at the moment.

In fact, Chen Yan could clearly hear Qin Yu's heartbeat speeding up.

Is this right? This is the normal reaction of a suspect facing interrogation.

"Qin Yu, you seem to be... surprised by this set of keys?"

ah?

Qin Yu withdrew his eyes and glanced away slightly: "This should be my decoration key. How did it get into your hands?"

"I should have placed this key in Room 803, Building 3, Hengchang Community... What, officer, is there something wrong with my key?"

question?

Chen Yan picked up the key bag: "Qin Yu, since I brought this bunch of keys to you, don't you think I didn't find anything strange in it?"

Weird?

Qin Yu's expression paused slightly, his face suddenly turned a little pale, and his hands and fingers subconsciously twisted together.

"Haha, officer, this is just a bunch of ordinary keys. We must have the owner's key when we are doing renovations."

"You see, one of the keys here is the door key to my house, and the rest are the keys to the owner's house that I am doing decoration. You see, the decoration key can only be used once. After the official key is inserted, these keys useless."

Five keys, two with black plastic handles and three with red plastic handles.

The so-called decoration key is actually a one-time key, and today's door locks are basically configured in this way.

During decoration, the decoration key can be used to open and close the door, but after the official key is inserted, the lock core point in the lock will change, and the decoration key will no longer work.

In order to distinguish decoration keys from official keys, the colors of the plastic handles of the two are generally different.

Liu Qingshan didn't speak when Chen Yan was asking questions, but he kept observing the changes in Qin Yu's expression.

Qin Yu was not just Chen Yan's first encounter with this. Liu Qingshan had interrogated not only 100 but also 80 people in his many years as a detective. Qin Yu was really the only person he had seen.

Facing the detective's questioning, his expression was calm and his logic was clear, leaving Liu Qingshan with no way to break through.

However, when Qin Yu just answered Chen Yan's question, his sudden change in expression and his subconscious twisting of his fingers finally exposed some problems.

It seems that this bunch of keys is the key point.

"You are right, these 5 keys do include the keys to your home and the renovation keys to the home of the owner who renovated it."

Chen Yan picked up the transparent plastic bag: "One of the three keys with red plastic handles is for Room 202 of Building 1, and the other one is the decoration key for Room 803 of Building 3 that you mentioned."

This statement has been confirmed on site and there is no problem.

"The other decoration key, if I guess correctly, should be the key to the decoration house you contracted in other communities."

Facing Chen Yan's questioning look, Qin Yu nodded hastily: "Yes, yes, there is also a renovated house in Hailongquan Community that is also under construction, but that construction period is longer, so the key is always with me."

Qin Yu seemed to have grasped a life-saving straw and followed Chen Yan's words.

Chen Yan nodded: "It turns out that the house was renovated in Hailongquan Community, so..."

Chen Yan picked out two other keys with black plastic handles and pushed them in front of Qin Yu: "Qin Yu, these two keys... you wouldn't say they are your house keys, right?"

Um?

Two ordinary keys with black plastic handles. One of them is relatively new and seems to have no signs of wear. However, the plastic handle of the other key is stained with a lot of gray mud, which is similar to the traces left after cement splashing and wiping.

However, these two ordinary keys, in Qin Yu's eyes, were like two sharp knives piercing his heart. Qin Yu's expression immediately froze, and there seemed to be a trace of fear in his eyes when he looked at the keys!