While there is no single official map named "Police Station" in the original Counter-Strike 1.6

Avoid any EXE installer claiming to be "CS 1.6 Police Station Installer". The map is just a .bsp file. Never run an executable from a map site.

Open the folder.

The community has developed several maps featuring police headquarters or similar urban law enforcement settings:

: For those playing the Steam version of CS 1.6, some creators have uploaded ported versions that are easy to subscribe to and install. Installation Instructions (Nasıl Kurulur)