police blotter vs blotter

police blotter and blotter both are nouns.

Word	Noun	Adjective	Verb	Adverb
police blotter	Yes	No	No	No
blotter	Yes	No	No	No

As nouns, police blotter and blotter are synonyms defined as:

police blotter and blotter: the daily written record of events (as arrests) in a police station

Other synonyms of police blotter include charge sheet, day book, rap sheet.

police blotter (noun)	blotter (noun)
the daily written record of events (as arrests) in a police station	the daily written record of events (as arrests) in a police station
	absorbent paper used to dry ink