Definition Normal Justice Department parlance for subjects of investigation includes "suspect", "subject" and "target". Each has specific meanings relevant to different levels of investigation. Senator Chuck Grassley, Republican of Iowa, wrote to the Attorney General for clarification of the unfamiliar phrase in September 2002. In December of that year, Nuclear Threat Initiative's Global Security Newswire summarized the response as follows: See also Targeted surveillance References 2001 anthrax attacks Criminal investigation Euphemisms Legal terminology