to ferret out :|ˈferət | to find out a piece of information | EngVestors Advanced

to ferret out :|ˈferət |
to find out a piece of information or find someone or something, after looking in many places or asking many questions;
to sniff out, to uncover
вынюхивать, выпытывать, разузнавать

She is determined to ferret out the truth about what happened;
Can a journalist ferret out the facts while operating as a one-man band;