"Ah—"
The man screamed in agony, as if his heart was being torn apart.
William Cole didn't kill him but punctured his spinal nerves instead.
This region controlled the pain receptors in a human body. When Cole's silver needle pierced it, the man's sense of pain was intensified by several hundred times.
The man writhed in pain on the ground, but it was to no avail. He smashed his head violently against the ground, hoping to knock himself unconscious.
Such intense pain was far beyond what any human could bear.
Cole said coldly, "I don't care who sent you. Those who kill my people must suffer pain."
"Don't worry, you're not going to die anytime soon."
The man begged for mercy, "Please, let me go."
"The two men aren't dead. I've only tied them up in the backyard."
Cole was taken aback. He immediately rushed to the backyard and found that Earnest Bauer and Master Dr. Brews were indeed unharmed. They were tied to a pole with their mouths gagged, but without any mortal danger.