Answer:

searcher

Answer	Crossword Clue
SEARCHER	Investigator
SEARCHER	One on a quest
SEARCHER	Bloodhound, on occasion

SEARCHER	Ransacker.
SEARCHER	Seeker.
SEARCHER	Hunter.
SEARCHER	Customs man, at times
SEARCHER	Person on a quest

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.