The Old King was indeed very likely killed by Chen Menglu.
However, Chen Menglu did not shoot the Old King.
But when the Old King's body was discovered, he had been shot, so his grandfather had indeed harmed the Old King, and still had inescapable crimes to be responsible for.
Shangguan Xiu's expression dimmed, disappointment showing in his eyes. Finally, he said in a deep voice, "Alright, I'll wait for you to examine these pieces of evidence. As for my grandfather's affairs, if he really ordered someone to shoot the Old King's body, you can sentence him. I won't interfere."
He now can only save his grandfather from death, has already done his best, but if his grandfather really ordered someone to shoot the Old King's body, then whatever price he has to pay, let him pay it himself. Shangguan Xiu does not want to care anymore.
Now, he is powerless even regarding the matters he cares about most.
