This is the 15398th most frequent Korean word.
범죄자들이
"범죄자들이" means "criminals" (plural, with a subject marker or topic emphasis in Korean).
The word '범죄자들이' is used as the subject of the sentence to describe the perpetrators of the action of robbing.
범죄자들이 한밤중에 은행을 털었다.
The criminals robbed a bank at midnight.
Here, '범죄자들이' signifies the individuals being searched for by the authorities.
경찰은 범죄자들이 어디 숨었는지 찾고 있다.
The police are searching for where the criminals are hiding.
In this case, '범죄자들이' refers to the general concept of criminals whom society believes deserve punishment.