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.
A detective.
A group of bears.
To act as a detective; to try to discover who committed a crime, or, more generally, to solve a mystery.