Scully: Found it. Here.
Charles: "Don't tell me where the next clue is hidden, tell me why."
Amy: "Tell me why." From that time Jake made the perp sing that song.
Jake: Wait a minute, you guys know about that? Were any of you actually there?
Rosa: You've told us the story many times.
Captain Holt: And tried to recreate the moment on several occasions.
[flashback:]
All: ♪ Working at the car wash ♪
Jake: No, number two and five, you're off key. Number three, you're coming in way too early. I mean, what are we even doing here, guys? [to the witness] So which one do you think killed your family?
[present:]
Jake: Yeah, I got to stop trying to recapture the magic of the original and move on. Anyways, back to the eighth annual heist.