Comment by egeozcan

Nothing. "Polis (police), son (latest) zamanlarda (times, at) bu (this) şehirde (city, within) faaliyetlerini (operations) arttırdı (increased)."

If I'm talking about a specific police officer, then I'd use "o", which means he/she/it/that.

O geldi -> he/she/it/that arrived.

O polis geldi -> that police arrived.

Ona polis geldi -> police arrived to him/her (his/her place).

polis geldi -> the police (has) arrived.

O bahsettiğin polis geldi -> The police officer you were talking about (has) arrived.