"Interrogator": "What happened when the man in the black suit tried to check what the two boys were doing?", 
"Interrogee": "Basically, he first asked what they were doing, and they replied that they had hired the land. But the man in the black suit insisted that the land belonged to him and threatened to call the police if they didn't vacate it. He attempted to check what they were doing.Aizen started argumenting with that black suit man and and then he attacked that man with with the knife and killed him."