trace down
Advanced (C1)neutral
find something by carefully following signs or information
"The reporter finally traced the witness down in a small coastal town."
Hear it in context

Watch Expert Brutally Exposes Rolex ‘Waitlist’ Scam, Dirty Secrets, & Celebrity Fakes | Nico Leonard
The Iced Coffee Hour · 42:15
Well, a Rolex isn't is difficult to trace down.

The Private Life of a First Lady: Barbara Bush Speaks
American Experience | PBS · 14:59
Parmet wrote that, and we tried to trace down the sources and we couldn't.

Build Hour: Workspace agents in ChatGPT
OpenAI · 24:02
and you can go in here and check the agent trace down to that level of detail.