ermittlern

In a sentence

• Die Ermittler arbeiten hart an der Aufklärung des Falles.

  The investigators are working hard to solve the case.

  The context 'ermittlern' here is as a noun 'Ermittler', which means 'investigator' in English. It is used to describe individuals acting in a capacity to investigate something.

• Sie hilft den Ermittlern bei ihrer Arbeit.

  She assists the investigators in their work.

  Here, 'ermittlern' is used as a dative plural form of 'Ermittler', referring to the investigators being assisted by someone.

• Durch ihre Erfahrung konnten die Ermittler den Täter schnell finden.

  Thanks to their experience, the investigators were able to find the perpetrator quickly.

  In this sentence, 'ermittlern' as the plural subject 'Ermittler' are acting as the primary agents conducting investigations.