Chalmers: Ross.
Bennet: Albert Edward Renick, used car salesman, Chicago.
Chalmers: Who's Renick?
Bullitt: He was the man who was shot in the Hotel Daniels. You sent us to guard the wrong man, Mr. Chalmers.
Bullitt: Who else knew where he was?
Walter Chalmers: What?
Bullitt: Who else knew where he was?
Walter Chalmers: What are you implying?
Bullitt: Well, they knew where to look for him, and they used your name to get in.
Walter Chalmers: Are you suggesting I disclosed his whereabouts?
Bullitt: Well, somebody did. And it didn't come from us.
Answer: The man shot at the hotel at the beginning is Renick. Ross assumed Renick's identity and was going to flee the country. Ross kills Mrs. Renick to keep her quiet. The man at the airport that Bullitt kills is Ross.
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