ferret out
US /ˈfɛrɪt aʊt/
UK /ˈfɛrɪt aʊt/

1.
herausfinden, aufspüren
to discover or find out something, especially something hidden or difficult to find
:
•
The detective managed to ferret out the truth after weeks of investigation.
Der Detektiv schaffte es, die Wahrheit nach Wochen der Ermittlungen herauszufinden.
•
It took a lot of effort to ferret out all the necessary information.
Es erforderte viel Mühe, alle notwendigen Informationen herauszufinden.