A detective or other person skilled at finding people or clues.
A large scenthound famed for its ability to follow a scent many days old, over vast distances. This dog is often used as a police dog to track missing people, fleeing suspects, or escaped prisoners.
An undercover informer.
One who ropes goods; a packer.
Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”)
Any of a variety of monsters with tentacles that they use to capture victims.
A person hired by a gambling establishment to locate potential customers and bring them in.