close observation of a person or group (usually by the police), law In criminal law, an investigation process by which police gather evidence about crimes, or suspected crime, through continued observation of persons or places, Close observation of an individual or group; person or persons under suspicion

To put into effect; carry out, To kill as punishment for capital crimes, To cause to become legally valid; as, to execute a contract, in rare To do one's work; to act one's part or purpose, To perform musically, verb_ carry out a process or program, as on a computer or a machine, carry out the legalities of, kill as a means of socially sanctioned punishment

A fine paid as compensation for violent crimes

A person, usually a member of a police force, who investigates crimes and obtains evidence or information, an investigator engaged or employed in obtaining information not easily available to the public, One who business it is so detect criminals or discover matters of secrecy, adjective_ Fitted for, or skilled in, detecting; employed in detecting crime or criminals, Suited for or used in detection,