So from the previous commentary and information posted, we can see that "police" is a rather unique noun. People perceive "police" as an uncountable noun even though it is plural. So let's welcome the noun "police" to the uncountable noun club.
- The mud is all over the floor.
- The copy paper is running low. Let's buy some more.
- The fog is thick tonight.
- The butter is in the refrigerator.
- The equipment is on the truck.
- The police are on all the highways tonight.
- Good wood is expensive.
- The ice is melting.
- The tea is in the cabinet.
- The coffee is next to the donuts.
- Speech is revealing.
- The blob is seeping through the door.