Stone cold - Robert B. Parker

Jesse Stone has a problem no officer of the law likes to face: Dead bodies keep appearing, but clues do not. A man takes his dog out for a run on the beach, only to be discovered hours later - with two holes in his chest. A woman drives her Volvo to the store to do some grocery shopping, and is then found dead, her body crumpled behind her loaded shopping cart. A commuter takes a shortcut home from the train, and never makes it back to his house. Hunting down a serial killer is difficult and dangerous in any town, but in a town like Paradise, the media are always on his back.