Solved: The Detective Returns

"Pull up your trouser legs?"

Ma Guozhen frowned, "What do you want to do?"

"Just look at it!"

Cao Huashan said: "I promise that what I said before is absolutely the truth!"

Hearing this, Ma Guozhen couldn't help but look at Lin Can on the side, and after seeing Lin Can nodding, Ma Guozhen got up, leaned down directly and pulled up Cao Huashan's trouser leg.

At Cao Huashan's ankle, there is an electronic ankle cuff device!

Seeing this, Ma Guozhen suddenly looked surprised, he raised his head and looked at Cao Huashan opposite, "When did you get on the electronic footcuff?"

"I didn't belong to Captain Ma at that time, so it's normal that you don't know, this thing was put on after Ding Lulu was killed. "

Cao Huashan said: "I was originally released from prison ahead of schedule, and then I was involved in several cases, although your police did not find evidence that I killed people before, but because I have a certain suspicion, I still put this electronic anklet on me." "

"But thanks to me wearing this electronic ankrest, otherwise I wouldn't be able to explain it. "

Cao Huashan said: "After all, I killed one person, you can't forcibly slander me for killing a group of people...... That's a lot of crime!"

Lin Can on the side also frowned.

Cao Huashan wears an electronic ankle cuff with a satellite positioning chip device in the cuff, which means that his position is monitored at all times.

If he commits a crime with this kind of foot handcuff, it is tantamount to killing himself, as long as they call up the trace map of Cao Huashan on the day of the crime, they will be able to know everything completely!

Seeing Cao Huashan on the other side looking like he was living after the catastrophe, Lin Can couldn't help but think deeply.

Could it be that Cao Huashan really didn't participate in this exchange killing?

"Leave this to the other interrogators, let's go out and have a look at the location surveillance first. "

Lin Can said to Ma Guozhen.

Ma Guozhen nodded, and then left the interrogation room with Lin Can.

After returning to the office, Ma Guozhen immediately notified the police officers of the relevant departments, came to the office with a laptop, and asked him to open the positioning monitoring chart of Cao Huashan's electronic anklem.

Lin Can and Ma Guozhen looked carefully at the map on the screen, and Cao Huashan's location showed a red dot in front of them.

At this moment, the location of the red dot appeared in the police station.

Lin Can asked: "Can you call up the positioning trajectory map of Cao Huashan on the night Song Danling was killed and the night Yang Wanfang was killed?"

"No problem!"

The officer responded, and immediately started working on the computer.

Half a minute later, a map of Cao Huashan's location trajectory from nine o'clock to three o'clock in the morning when Song Danling was killed appeared on the computer screen.

According to the trajectory map, Cao Huashan went to a billiards hall in the city for a while, and then went to the nearby night club, not only did he not go to Song Danling's house, but even kept a considerable distance from Song Danling's house.

"Bring up another trajectory map as well!"

Ma Guozhen commanded.

The police officer nodded, then tapped the keyboard a few times, and the screen suddenly changed to a positioning trajectory map of Yang Wanfang when she was killed.

This trajectory map records Cao Huashan's trajectory from 10 o'clock last night to 4 or 5 o'clock this morning.

The red dot has been parked in a business hotel next to the zero point bar, and there has been almost no change!

This means that Cao Huashan has been in that hotel during that time, and he has never been to Yang Wanfang's flower shop!

"The quality of this electronic ankle is extraordinary, and it is impossible for Cao Huashan to unravel it. "

Ma Guozhen said: "Besides, even if he really unravels it, our side will receive instructions at any time, so Cao Huashan's previous confession did not lie...... He really had nothing to do with either case. "

Hearing this, Lin Can couldn't help but close his eyes and think deeply.

Cao Huashan has never been to the scene of the two cases...... In other words, he was not a participant in this exchange killing......

Could it be that Cao Huashan has other ways to evade the monitoring of electronic foot cuffs?

What exactly went wrong?

Knock knock.

There was a knock on the door.

"Come in. "

Ma Guozhen said directly.

The office door was pushed open, and Chen Lingyue walked into the office gently, while accepting a stack of materials.

She put the information on her desk and said at the same time: "When I re-examined the body of the deceased Yang Wanfang before, I found a small piece of skin tissue in her throat, and some subcutaneous tissue was stained on it. "

"I speculate that Yang Wanfang should have bitten it on the murderer's hand when she was fighting with the murderer. "

Chen Lingyue said: "At that time, the murderer strangled the neck of the deceased with a car chain, so the deceased almost swallowed this piece of skin tissue. "

"Is there a DNA test for this tissue?"

Lin Can asked.

"Of course. "

Chen Lingyue nodded and said, "After testing, the result is that there is no registered blood type A male. "

"Blood type A?"

Lin Can thought for a moment, and then immediately said to Ma Guozhen on the side: "Bring over the information of Lu Kongming, Cao Huashan and Jian Feng!"

Ma Guozhen immediately searched on the desk for a while, then took out a few pieces of information from it and handed them to Lin Can.

Lin Can immediately compared the information of the three people, and then his brows furrowed again.

Ma Guozhen on the side was also shocked, "None of these three people have type A blood?"

Lin Can rubbed his temples as his brain spun rapidly.

DNA blood group mismatch...... The electronic footcopy also showed no trace of the crime......

"Do you mean ......?"

Lin Can suddenly thought of something, and he said to Ma Guozhen on the side: "You immediately ask the police to integrate the criminal information of all the cases that Jian Feng has been involved in, I need to see these materials immediately, the sooner the better!"

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