Here are the safest methods to download the authentic cs_police.bsp (or de_police.bsp / as_police.bsp ).
I deleted it.
The Police Station map forces you to listen to footsteps through thin drywall. It rewards knowing which desks are bulletproof and which are not. It punishes the lone wolf and celebrates the coordinated flash-and-clear. Counter Strike 1.6 Police Station Map Indir