Karla Wilson: "Try" is like "maybe," Julie. "Try" is bullshit.
Nancy: This island didn't have a murder rate until you people showed up.
Tyrell: Don't get her started all right. It's a long fucked up story and you probably won't believe it anyway. All I know is that this is the worst vacation of my life. I'm tired, I'm hungry, I'm fucking horny and I ain't seen one goddamn psycho killer.
Answer: I think that Estes already knew that Will was Ben's son. He had made a comment about a man (Ben) killing his wife (Sarah) in the same room Julie and Will was staying in. He also makes a comment about Will having his mother's eyes. So he probably recognized him. He also knew that the answer they gave to the radio host was wrong, and that proved it was a set up from the beginning.