Who killed Bi-Han family?

Bi-Han is also mentioned by Scorpion after he discovers Quan Chi’s involvement with the death of his family and the Shirai Ryu, Sub-Zero explains that Quan Chi was responsible for his death, not Scorpion.

Who killed Noob Saibot?

RECOGNITION. Shadow of the Netherrealm. In life, Noob Saibot was known as Sub-Zero. Unjustly murdered by Scorpion, he was resurrected by Quan Chi and granted power over darkness, but as Quan Chi’s slave.