Who is the murderer

Liu Hui Ying turned to glance at the man with a blank expression which was full of disdain, he could not even make an excuse for her. He was truly something else. Though she was annoyed, Liu Hui Ying still turned her head to look at Ji Yang who was looking at her with a questioning look in his eyes and answered in a solemn voice, " I was always with the group, it's just that geniuses like me do not like to interact with others for no reason which was why I stayed in the dark and in silence. The loud hoo-hah is not something that I like, right prime minister Ji." 

Her voice was laced with unbridled confidence and arrogance which made others speechless. 

What was with that tone? Was this man looking down on them?