DI Charles King (DICK for short) and DC Andy Copp (DC/AC for short) are combing the crime scene (with a comb, which they are taking turns with).
DC: Here, Detective Inspector Charles King, I found this elbow print on the window sill.
DI: Elbow print? How can you trace an elbow print, let alone detect one?
DC: I specialised in elbows at Police Training School.
DI: Well done, Detective Constable Andy Copp; is there a National Register of elbow prints?
DC: No. We just have a few pictures back at the Yard.
DI: How very useful that may prove to be waits to be seen.
DC: It does, doesn’t it.
DI: Yes, it does.
SD They wait.