He's in a rush to make a move on Elly Campbell now, and for sure he won't let Helen off the hook.
Harry Hall's expression is somber at this moment, and after a brief pause, he scoffs coldly: "Just over sixty and in such a hurry to court death, why bother?"
"Have you thought about how you're going to handle it?"
Adam Jones looks at him, sees a touch of sinister in his eyes, and nods in agreement.
"How you're going to proceed is not my place to ask, but just a reminder—don't underestimate your younger brother."
Harry Hall looks up at him, and Adam continues: "Your brother isn't as simple as he seems on the surface. Be careful, don't focus all your attention on your father and overlook him."
Harry Hall is aware of the fact that Leo Hall saved Elly Campbell from under the truck and the investigation results clearly indicate that the accident was orchestrated by William Hall.
The purpose, of course, is to pave the way for Leo Hall to take over the Hall Clan.