Super Killer, and Consulting a Professional

Luke drew a circle with his finger, indicating for her to adjust the position of the drone. "Look here. Didn't you just ask who that super killer is? Pay attention to that man in the suit attacking the Tarasov family. That's him."

Selina: "What?"

She looked at Luke suspiciously, but immediately refocused on the battle. "How do you know that?"

Luke said, "It would be strange if it wasn't him. The day before Christmas Eve, when I was sending Elena back to school, the Tarasov family sent people to a house in New Jersey owned by someone called John West, whether to silence him or for revenge. However, he killed all twelve of them. So, what happened at the nightclub and what's happening here might be a personal grudge."

There was no need for a super killer like John West to incur hatred with a troublesome force like the Tarasov family unless it was a personal grudge that was hard to resolve.