Yusuf Zuck told Maurice Singleton that he needed hostages, the Achilles' heel of the six managers!
Indeed, when it came to forcefully subduing these matters, Yusuf Zuck didn't feel secure. If he wanted them to truly work for him, he needed to grasp their life-and-death weaknesses.
So he had Maurice Singleton take control of the family members of the six!
Six people couldn't have possibly come out of the cracks in a rock; they were sure to have parents, or children or lovers. So, as long as he controlled the people that mattered most to them, he wouldn't worry about them betraying him.
He wanted not only their obedience and loyalty but also their silence, so what happened today should be known only to them.
Elena had a nickname called the Black Widow - she indeed had dead men, with rumors saying she killed them herself. She was the leader of a group, and seemingly had hundreds of prostitutes sent from all over the world under her.