Who did it

At a police station

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Cop: Just give me the facts, sir, please, just the facts. Address?
Man: The facts? The address?
Cop: Yes. Where did you witness this accident?
Man: Oh, It was in Frankie's workshop.
Cop: Uh, witness said he witnessed the accident in Frankie's workshop.
Now, Who? Where? When? What? Why?
Man: What are you talking about?
Cop: I always like to ask who did it; where they did it; when they did it; what they did, and why they did it.
Man: Oh, you do?
Cop: Yes, I do; and just to get the facts straight.
Man: I see.

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What does "did" mean in this dialogue"

Does "who did it?" mean "who committed the crime?"

Thank you