Cassidy saw how Adrian went from alarmed to panic-stricken to enraged.
She herself was overwrought. Then again, getting followed around by some shady-looking stranger is serious enough to make her feel distraught. However, unlike him, she was still able to keep her calm somehow. She managed to pull herself together and think things through.
So, before he could send out an order to lock down the whole amusement park just to capture that stalker, she got to talk him out of it.
"Adrian, checking the surveillance cameras is enough for now. The security can handle this. No need to go that far..." Cassidy said to Adrian right before he gave a call to Edward and told him about what happened.