Nov. 9 -- FBI profilers say anthrax-laced letters to Senate Majority Leader Tom Daschle, NBC News and The New York Post were likely mailed by the same person, an angry young man with a grudge. MORE ...

Associated Press WriterWASHINGTON (AP) -- The anthrax mailings probably are the work of a man who is familiar with hazardous material, works where he has little contact with other people and may have ...

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An FBI profile of assailants who commit mass murders is used by experts such as Alan Heisterkamp, a specialist with the Center for Violence Prevention in Cedar Falls, Iowa. The typical assailant has ...