The Ultimate Executive Officer

Central City, Police Station.

Joe and Barry got into the car and started the continuing investigation journey. After Tang Tian revealed some secrets, Qiao made up his mind to investigate the past cases.

On the asphalt road in the outskirts of Zhongcheng, a car stopped in front of a house, and two people came out of it. They were Barry and Joe West.

"Barry, do you feel scared when you go back to your old home?" Joe turned to look at Barry and asked him.

"In the past, it might have made me a little desperate, but now it is enough to have you help me." Barry said gratefully to Joe.

Joe patted Barry on the shoulder and said encouragingly: "Barry, I swear that I will return your father's innocence. I will go to Star City tomorrow to conduct an on-site investigation."

Barry nodded to Joe, they looked at each other and smiled, Joe knocked on the door, this house was Barry's former residence.

"Dong dong dong!" Joe didn't knock a few times, and a middle-aged woman in pajamas came out from inside. After opening the door, she didn't ask anything, and first gave Barry and Joe a wink.

"Eh..." Barry's expression was full of chills, as if he had eaten a fly, but he managed to maintain a stiff expression.

Because the clues to investigate the murder of their mother are inside, it is impossible for them to back down. Seeing Barry's expression, Joe walked out and said to the middle-aged woman in front of him, "Hello, ma'am, there was a case in this room before, and we need to investigate it. Can you let us go in and investigate it?"

"It doesn't matter, I live here alone." The middle-aged woman said to Joe "meaningfully", and even Joe couldn't help but let go of his hand that was about to take the police certificate.

When Qiao heard this, some cold sweat could not help showing on his face, but his good quality made him nod his head and said, "Thank you for your cooperation, ma'am."

After Barry and Joe walked in, Barry looked around the house and sighed, the feeling that things were different made him a little sentimental.

Joe took the file at the time and explained to Barry in detail the location, direction, and some details of his mother's murder.

"Oh, it's been too long, it's been fourteen years." Barry said helplessly, he knew that the change of time had caused many key pieces of evidence to disappear.

"That's right, Barry, but have you noticed? Only the front mirror hasn't changed." Joe compared the photos carefully and said affirmatively.

Barry walked towards the position of the mirror. This item, which has hardly changed in the photo, showed a thoughtful expression.

"Wait, Joe, what is the material behind the old-fashioned mirror?" Suddenly, Barry had a flash of inspiration and asked immediately as if he had thought of something.

"Silver nitrate." Joe said affirmatively. As an experienced police detective, he knew a lot, so he reacted immediately.

"Silver nitrate is mostly used for photography and the back of old-fashioned mirrors. If it was in this situation, the electromagnetic sparks generated by the speedsters would cause the flashes to be continuously exposed to the silver nitrate. Then the image we need is in the on the mirror."

Barry showed a slight smile. He was obviously excited to find these key evidences, and he was still one step closer to the breakthrough.

"Sisko's equipment can restore the original scene, which is of great help to us." Barry was surprised to think of the team behind him, and it might be better to ask Sisko to help.

"Okay then, Barry, you go and find those images, I'll go to Star City to check." Joe nodded to Barry, and they left the room with the mirror.

At the same time, Star City Base 34, the control room.

Wearing a military uniform, Betty walked up to Tang Tian with the documents, and said to him solemnly: "Sir, we found that Barry Allen and Joe West went to a house once and brought out a mirror when they left."

"Ok,

go down! Betty, I see. " Tang Tian nodded thoughtfully, and ordered Betty.

"Yes, sir." Betty said respectfully, and then left the control room.

"They are about to reveal the truth, what role should I play?" Tang Tian smiled meaningfully and looked in the direction of Zhongcheng.

At this time, Hartley also walked in, looked at Tang Tian's thoughtful expression, smiled and said: "You seem to be very concerned about the cutting-edge laboratory, have they also discovered Wells' secret?"

Hartley's eyes gleamed with anger, and he still had some bitterness about Wells kicking him out of the cutting-edge laboratory.

"Hartley, you are right, this is the current situation." Tang Tian smiled and explained.

"So what role will we play?" Hartley asked with interest.

"Wait and see what happens." Tang Tian said affirmatively.

Regarding the relationship between Barry and Reverse Lightning, Tang Tian didn't feel the need to intervene. He himself doesn't like to be nosy and cause trouble for himself, except for the entanglement of interests, he doesn't care about the rest.

"By the way, I have something to show you. I am very good at sonic weapons. As long as I find the resonant frequency of an object, I can almost destroy matter." Hartley said confidently.

"Of course, buddy, I believe in you." Tang Tian patted Hartley on the shoulder and said with a smile.

"Your sonic weapon has great potential, I'm more optimistic." Tang Tian patted Hartley on the shoulder and said with a smile.

What Tang Tian knew was that Hartley's sonic frequency resonance had great potential. If fully developed, it would be a breeze to destroy any physical structure.

For example, at the beginning of the 19th century, under the command of the commander, a group of Napoleon soldiers crossed a bridge in Angers, France with mighty and uniform steps. When approaching the middle of the bridge, the bridge suddenly trembled violently and finally broke and collapsed, causing many officers, soldiers and citizens to fall into the water and die. After investigation, it was found that the culprit of the tragedy was the same resonance frequency.

Because when the soldiers of the brigade walk in unison, a frequency generated coincides with the natural frequency of the bridge, which strengthens the vibration of the bridge. When its amplitude reaches the maximum and exceeds the bridge's resistance to compression, the bridge breaks.

The principle of Hartley's sonic weapon is also the same. When the frequency of the sound wave is equal or close, the resistance of the substances is not enough to consume the energy of their mutual excitation. At this time, the vibration of the whole substance will be unstable, and the vibration amplitude (amplitude) will be It gets bigger and bigger until the object is completely destroyed.

Tang Tian is also quite optimistic about Hartley's research direction. In the second season, Hartley used the principle of sound wave resonance to repel the time undead chasing and killing Barry Allen. It can be said that he is not powerful.