를 찾아냈다

found

→ 를
phrase Rare #20,449
found The object marker 를 follows the thing that was found; 찾아내다 often emphasizes successfully finding or discovering something.
KO: 경찰이 용의자를 찾아냈다.
EN: The police found the suspect.

내가 놓치고 있는 중요한 뭔가가 있었지만, 어쨌든 나는 다른 질문 하나를 찾아냈다.

I was missing something important, but anyway, I found another question.