"Well, well, well, looks like I found all of my enemies. "
The new voice was unexpected and they all jumped. We all looked at the newcomer. The door was locked. How did he come in? He was as quiet as a mouse when he sneaked upon us. Now he did really look like a psychopath instead of my professor. He had died. How did he survive? There was a key link we were missing.
"Nice to see you, brother."
The newcomer gazed at our masked ally in confusion before he smiled.
"Are you scared to show your face to your students?"
"No. I don't want you to escape alive and use me as a target. But I'm not scared of you."
The masked guy removed his black mask and I gasped. Of course, Astr remained cool at the revelation that they were identical twins. That explained a lot.
"You killed him. Why?" The unmasked guy said.
"Because he knew my secret." The evil twin said.
