The Ultimate Executive Officer

Middle city, police station.

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

On the asphalt road on the outskirts of Midtown, a car stopped in front of a house, and two people came out, it was Barry and Joe West.

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

"Before, maybe it made me a little desperate, but now it's enough to have you help me." Barry said to Joe gratefully.

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

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

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

"Uh..." Barry's expression was full of chills, as if he had eaten a fly, but he barely maintained a stiff expression.

Because the clues to investigate the murder of their mother are in it, they can't back down. Seeing Barry's expression, Joe walked out and said to the middle-aged woman in front of him, "Hello, ma'am, there used to be a case in this room that we need to investigate. Can we go in and investigate?"

"It doesn't matter, this is where I live alone." The middle-aged woman said to Qiao "meaningfully", and even Qiao's hand that was about to take the police officer's license couldn't help but put it down.

When Qiao heard this, cold sweat broke out on his face, but his good quality made him nodded and said, "Thank you for your cooperation, ma'am."

After Barry and Joe walked in, Barry looked around the house and sighed, feeling a little sentimental about being a different person.

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

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

"That's right, Barry, but have you noticed? Only the front mirror doesn't change." Joe carefully compared the photos and said with certainty.

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

"Wait, Joe, what's the raw material for the back of 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 in photography and the back of old-fashioned mirrors. If this was the case at the beginning, the flashes caused by the electromagnetic sparks generated by the speeders were constantly exposed on the silver nitrate, then our key image needs are in on the mirror."

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

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

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

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

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

"Well, let's go! Betty, I see." Tang Tian nodded thoughtfully and ordered Betty.

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

"They are about to unravel the truth. What role should I play?" Tang Tian showed a meaningful smile and looked in the direction of Zhongcheng.

At this time, Hartley also walked in, looked at Tang Tiansi's expression, smiled and said, "You seem to be paying attention to the cutting-edge laboratory. Did they also discover Wells' secret?"

Hartley's eyes flashed with anger, and he was still a little bit worried that Wells had kicked him out of the cutting-edge laboratory.

"Hartley, you're right, that's the situation right now." Tang Tian explained with a smile.

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

"Just wait and see what happens." Tang Tian said with certainty.

Tang Tian didn't feel the need to intervene in the relationship between Barry and Reverse Lightning. He doesn't like to meddle in his own business and cause trouble for himself~www.NovelMTL.com~ Except for the entanglement of interests, he doesn't care about the rest.

"By the way, I have something for you to see. I have a lot of research on sonic weapons. As long as I find the resonance frequency of an object, I can almost destroy matter." Hartley said confidently.

"Of course, man, I believe 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, destroying any material structure is a breeze.

For example, at the beginning of the 19th century, a group of Napoleonic soldiers, under the command of the commander, marched in a mighty and uniform step across a bridge in Angers, France. When approaching the middle of the bridge, the bridge suddenly trembled violently and eventually collapsed, causing many officers, soldiers and citizens to fall into the water and die. After investigation, it was found that the culprit for this tragedy was the consistent resonance frequency.

Because when the soldiers of the brigade walk in unison, a frequency is generated that is exactly the same as the natural frequency of the bridge, which strengthens the vibration of the bridge. When its amplitude reaches the maximum limit until it exceeds the pressure resistance of the bridge, the bridge will break.

The same is true of Hartley's sonic weapon principle. When the frequencies of the sound waves are equal or close to each other, the resistance of the material is not enough to consume the energy of their mutual excitation. At this time, the vibration of the entire material 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 optimistic about Hartley's research direction. In the second season, Hartley used the principle of sonic resonance to repel the time undead who were chasing and killing Barry Allen. It can be said that he is not weak.