He'd been saving the pickle for last. Who the hell did she think she was? Frank listened, silent, a glare creeping across his face. So she wasn't a cop anymore, but she was a bounty hunter and Castle wasn't sure which was more dangerous to him. Either way, she'd seen him coming out of the hotel, she'd tracked him here, and now she was warning him. More like threatening him. Pride goes before a fall.
When Misty was finished speaking, Frank stood abruptly, his expression hard. He jerked the fork in his hand and slammed it down to stick straight up from the wooden tabletop. Without a word he turned and left the deli. He'd have to be more careful and he'd have to watch out for Misty Knight.