Questions & Answers about Policie zná tento případ.
Czech does not use articles like the or a/an.
So Policie zná tento případ can naturally mean The police know this case. Whether something is definite or indefinite is usually understood from context, word order, or words like tento (this).
Zná is the 3rd person singular present tense form of the verb znát.
So:
- znát = to know, to be familiar with
- on/ona/ono zná = he/she/it knows
- policie zná = the police know(s)
Because policie is singular, Czech uses zná, not a plural form.