This is the 18009th most frequent Korean word.
수사하다가
"수사하다가" means "while investigating."
수사하다가 here expresses the act of investigating during which another event occurs, indicating simultaneity or sequence.
경찰이 사건을 수사하다가 중요한 증거를 발견했다.
The police discovered important evidence while investigating the case.
수사하다가 is used to signify the action of investigating is interrupted by another event, indicating a sequence or consequence.
그는 범인을 수사하다가 피로로 인해 쓰러졌다.
He collapsed due to fatigue while investigating the criminal.
수사하다가 illustrates the continuity of the investigation process and marks an occurrence happening during the ongoing action.