This is the 18007th most frequent Korean word.
수사하거나
"수사하거나" means "to investigate or inquire."
Here, '수사하거나' refers to the investigative action as one of the actions presented alongside seeking evidence.
법률을 위반한 상황을 수사하거나 증거를 찾아야 합니다.
The situation of breaking the law should be investigated or evidence should be found.
In this sentence, '수사하거나' is used to describe the police's potential actions, investigating being one and tracking clues being another.
경찰이 범인을 수사하거나 단서를 추적합니다.
The police investigate the criminal or track the clues.
In this sentence, '수사하거나' is used to indicate the action of investigating as one potential option among others, introduced by '하거나', meaning 'or'.