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: Notice: Aprea is credited as "Killer", not "The Killer." I think this confuses reviewers, as they assume he must be one of the hit men. However, the hit men are credited as "Phil" (Bill Hickman) and "Mike" (Paul Genge). Genge is much older than Aprea and Aprea does not look like the grey-haired hit man, as another contributor has pointed out already. There is no other killer in the plot. Perhaps Aprea's scenes were cut.