This is the 619th most frequent German word.
ermittler
Investigator.
In this sentence, 'Ermittler' is used as a noun to denote an investigator, i.e., someone conducting inquiries or investigations.
Der Ermittler führte eine gründliche Untersuchung durch.
The investigator conducted a thorough investigation.
Here, 'Ermittler' is used as a role or title, referring to the profession or activity of investigating.
Als Ermittler lernt man, auf kleinste Details zu achten.
As an investigator, one learns to pay attention to the smallest details.
Here, 'Ermittlers' is in the genitive case, showing possession or association, indicating the investigator's specific capability.