This is the 13070th most frequent Turkish word.
karakoldaki
"At the police station" or "belonging to the police station."
In this sentence, "karakoldaki" means "at the police station," describing the location of the police teams.
Karakoldaki polis ekipleri ihbar üzerine harekete geçti.
The police teams at the station acted upon the alert.
Here, "karakoldaki" specifies that the friend mentioned is the one located in the police station.
Karakoldaki arkadaşım bana kahve göndermiş.
My friend at the station sent me coffee.
"Karakoldaki" in this context functions to indicate the association of the events with the police station location.