"Hostile Negotiations" is an orchestral piece on the Season 4 soundtrack. It plays as Ben challenges Keamy to kill Alex.
Having heard Ben refuse to exit his house, Keamy fetches Alex and puts a gun to her head. Ben still refuses to leave. Keamy gives Ben ten seconds to comply. Ben says that Alex isn't even his daughter - that he stole her from an insane woman. She's a pawn, he says; she means nothing to him.
In the middle of one of Ben's sentences, Keamy pulls the trigger.