That's Her

At the backstage, Frederick signaled his assistant to come closer. He had an unreadable expression on his face as he glanced at Damien's direction from afar. 

"Yes, Chairman?" the assistant asked when he came to Frederick's side.

"You heard the conversation earlier. Find out who the anonymous tipper is, and also who Damien hired to investigate the case." Frederick nodded to his assistant, his way of telling the other to leave.

He fixed his tie in place and pulled on a neutral smile on his face before he headed towards a group of business associates, shaking their hands as soon as he met them, and then began the customary small talk.

Meanwhile, Damien and William turned around and strolled towards their friends. The former took a small device out of his inner pocket and handed it over to his cousin as he said, "I know you said that you can handle it, but I already had this prepared beforehand just in case you need it. You can do whatever you want."