The St. Patrick's Day Murder (Christine Bennett Series #4)

An off-duty police officer is shot and ex-nun Chris Bennett and her police-detective boyfriend find this motiveless murder puzzling. Praying for a break, Chris pursues a killer along strange paths: a pilgrimage that takes her from a suburban convent to a Brooklyn fruit market, and deep into the sacrosanct world of the NYPD—and ultimately back to the deadly place where it all began.